Signaling of control information in a communication system

ABSTRACT

Method and apparatus are provided for decoding a downlink control information (DCI) format that schedules a physical uplink shared channel (PUSCH) transmission and includes a field indicating whether or not data information is multiplexed in the PUSCH and for transmitting the PUSCH with or without data information depending on the indication by the field.

CROSS-REFERENCE TO RELATED APPLICATIONS AND CLAIM OF PRIORITY

The present application claims priority to:

U.S. Provisional Patent Application Ser. No. 62/612,914, filed on Jan.2, 2018; and

U.S. Provisional Patent Application Ser. No. 62/616,228, filed on Jan.11, 2018.

The content of the above-identified patent document is incorporatedherein by reference.

TECHNICAL FIELD

The present application relates generally to control schemes in wirelesscommunication systems. More specifically, this disclosure relates tosignaling of control information in wireless communication systems.

BACKGROUND

5th generation (5G) or new radio (NR) mobile communications, initialcommercialization of which is expected around 2020, is recentlygathering increased momentum with all the worldwide technical activitieson the various candidate technologies from industry and academia. Thecandidate enablers for the 5G/NR mobile communications include massiveantenna technologies, from legacy cellular frequency bands up to highfrequencies, to provide beamforming gain and support increased capacity,new waveform (e.g., a new radio access technology (RAT)) to flexiblyaccommodate various services/applications with different requirements,new multiple access schemes to support massive connections, and so on.The International Telecommunication Union (ITU) has categorized theusage scenarios for international mobile telecommunications (IMT) for2020 and beyond into 3 main groups such as enhanced mobile broadband,massive machine type communications (MTC), and ultra-reliable and lowlatency communications. In addition, the ITC has specified targetrequirements such as peak data rates of 20 gigabit per second (Gb/s),user experienced data rates of 100 megabit per second (Mb/s), a spectrumefficiency improvement of 3×, support for up to 500 kilometer per hour(km/h) mobility, 1 millisecond (ms) latency, a connection density of 106devices/km2, a network energy efficiency improvement of 100× and an areatraffic capacity of 10 Mb/s/m2. While all the requirements need not bemet simultaneously, the design of 5G/NR networks may provide flexibilityto support various applications meeting part of the above requirementson a use case basis.

SUMMARY

The present disclosure relates to a pre-5th-Generation (5G) or 5G/NRcommunication system to be provided for supporting higher data ratesbeyond 4th-Generation (4G) communication system such as long termevolution (LTE). Embodiments of the present disclosure provide signalingof control information in advanced communication systems.

In one embodiment, a method is provided. The method comprises decoding adownlink control information (DCI) format. The DCI format schedules aphysical uplink shared channel (PUSCH) transmission and includes a firstfield indicating whether or not data information is multiplexed in thePUSCH. The method also comprises transmitting the PUSCH. Datainformation is multiplexed or is not multiplexed in the PUSCH dependingon the indication in the first field.

In another embodiment, a user equipment (UE) is provided. The UEcomprises a decoder configured to decode a downlink control information(DCI) format. The DCI format schedules a physical uplink shared channel(PUSCH) transmission and includes a first field indicating whether ornot data information is multiplexed in the PUSCH. The UE also comprisesa multiplexer configured to multiplex or not multiplex data informationin the PUSCH depending on the indication in the first field. The UEadditionally comprises a transmitter configured to transmit the PUSCH.

In yet another embodiment a base station is provided. The base stationcomprises an encoder configured to encode a downlink control information(DCI) format. The DCI format schedules a physical uplink shared channel(PUSCH) transmission and includes a first field indicating whether ornot data information is multiplexed in the PUSCH. The base station alsocomprises a de-multiplexer configured to de-multiplex or notde-multiplex data information in the PUSCH depending on the indicationin the first field. The base station additionally comprises a receiverconfigured to receive the PUSCH.

Other technical features may be readily apparent to one skilled in theart from the following figures, descriptions, and claims.

Before undertaking the DETAILED DESCRIPTION below, it may beadvantageous to set forth definitions of certain words and phrases usedthroughout this patent document. The term “couple” and its derivativesrefer to any direct or indirect communication between two or moreelements, whether or not those elements are in physical contact with oneanother. The terms “transmit,” “receive,” and “communicate,” as well asderivatives thereof, encompass both direct and indirect communication.The terms “include” and “comprise,” as well as derivatives thereof, meaninclusion without limitation. The term “or” is inclusive, meaningand/or. The phrase “associated with,” as well as derivatives thereof,means to include, be included within, interconnect with, contain, becontained within, connect to or with, couple to or with, be communicablewith, cooperate with, interleave, juxtapose, be proximate to, be boundto or with, have, have a property of, have a relationship to or with, orthe like. The term “controller” means any device, system or part thereofthat controls at least one operation. Such a controller may beimplemented in hardware or a combination of hardware and software and/orfirmware. The functionality associated with any particular controllermay be centralized or distributed, whether locally or remotely. Thephrase “at least one of,” when used with a list of items, means thatdifferent combinations of one or more of the listed items may be used,and only one item in the list may be needed. For example, “at least oneof: A, B, and C” includes any of the following combinations: A, B, C, Aand B, A and C, B and C, and A and B and C.

Moreover, various functions described below can be implemented orsupported by one or more computer programs, each of which is formed fromcomputer readable program code and embodied in a computer readablemedium. The terms “application” and “program” refer to one or morecomputer programs, software components, sets of instructions,procedures, functions, objects, classes, instances, related data, or aportion thereof adapted for implementation in a suitable computerreadable program code. The phrase “computer readable program code”includes any type of computer code, including source code, object code,and executable code. The phrase “computer readable medium” includes anytype of medium capable of being accessed by a computer, such as readonly memory (ROM), random access memory (RAM), a hard disk drive, acompact disc (CD), a digital video disc (DVD), or any other type ofmemory. A “non-transitory” computer readable medium excludes wired,wireless, optical, or other communication links that transporttransitory electrical or other signals. A non-transitory computerreadable medium includes media where data can be permanently stored andmedia where data can be stored and later overwritten, such as arewritable optical disc or an erasable memory device.

Definitions for other certain words and phrases are provided throughoutthis patent document. Those of ordinary skill in the art shouldunderstand that in many if not most instances, such definitions apply toprior as well as future uses of such defined words and phrases.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present disclosure and itsadvantages, reference is now made to the following description taken inconjunction with the accompanying drawings, in which like referencenumerals represent like parts:

FIG. 1 illustrates an example wireless network according to embodimentsof the present disclosure;

FIG. 2 illustrates an example gNB according to embodiments of thepresent disclosure;

FIG. 3 illustrates an example UE according to embodiments of the presentdisclosure;

FIG. 4 illustrates an example DL slot structure according to embodimentsof the present disclosure;

FIG. 5 illustrates an example UL slot structure for PUSCH transmissionor PUCCH transmission according to embodiments of the presentdisclosure;

FIG. 6 illustrates an example encoding process for a DCI formataccording to embodiments of the present disclosure;

FIG. 7 illustrates an example decoding process for a DCI format for usewith a UE according to embodiments of the present disclosure;

FIG. 8 illustrates an example transmitter block diagram for datainformation and UCI in a PUSCH according to embodiments of the presentdisclosure;

FIG. 9 illustrates an example receiver block diagram for datainformation and UCI in a PUSCH according to embodiments of the presentdisclosure;

FIG. 10 illustrates a flow chart of a method for a determination of aPUSCH for multiplexing HARQ-ACK information according to embodiments ofthe present disclosure;

FIG. 11 illustrates a flow chart of a method for a determination by theUE of a PUCCH transmission power based on a spatial setting parameterfor a PUCCH resource according to embodiments of the present disclosure;

FIG. 12 illustrates an example UE behavior for multiplexing UCI fromtime-overlapped PUCCH transmissions in one of the PUCCH transmissionsaccording to embodiments of the present disclosure;

FIG. 13 illustrates an example UE behavior for multiplexing UCI fromtime-overlapped PUCCH and PUSCH transmissions in a PUSCH transmissionaccording to embodiments of the present disclosure;

FIG. 14 illustrates a flow chart of a method for determination for anumber of repetitions of a PUCCH transmission that includes a UCIpayload, based on a number of repetitions provided by higher layers fora reference UCI payload according to embodiments of the presentdisclosure;

FIG. 15 illustrates a flow chart of a method for determination for anumber of repetitions of a PUCCH transmission based on an indicated TCIstate in a DCI format triggering the PUCCH transmission according toembodiments of the present disclosure;

FIG. 16 illustrates a flow chart of a method for determination for aPUCCH transmission power based on a UCI type that is included in thePUCCH transmission according to embodiments of the present disclosure;and

FIG. 17 illustrates a flow chart of a method for determination for anumber of slots for a PUCCH transmission based on a code rate and anumber of slots provided by higher layers according to embodiments ofthe present disclosure.

DETAILED DESCRIPTION

FIG. 1 through FIG. 17, discussed below, and the various embodimentsused to describe the principles of the present disclosure in this patentdocument are by way of illustration only and should not be construed inany way to limit the scope of the disclosure. Those skilled in the artwill understand that the principles of the present disclosure may beimplemented in any suitably arranged system or device.

The following documents are hereby incorporated by reference into thepresent disclosure as if fully set forth herein: 3GPP TS 38.211 v15.1.0,“NR, Physical channels and modulation;” 3GPP TS 38.212 v15.1.0, “NR,Multiplexing and Channel coding;” 3GPP TS 38.213 v15.1.0, “NR, PhysicalLayer Procedures for Control;” 3GPP TS 38.214 v15.1.0, “NR, PhysicalLayer Procedures for Data;” 3GPP TS 38.321 v15.1.0, “NR, Medium AccessControl (MAC) protocol specification;” and 3GPP TS 38.331 v15.1.0, “NR,Radio Resource Control (RRC) Protocol Specification.”

FIGS. 1-4B below describe various embodiments implemented in wirelesscommunications systems and with the use of orthogonal frequency divisionmultiplexing (OFDM) or orthogonal frequency division multiple access(OFDMA) communication techniques. The descriptions of FIGS. 1-3 are notmeant to imply physical or architectural limitations to the manner inwhich different embodiments may be implemented. Different embodiments ofthe present disclosure may be implemented in any suitably-arrangedcommunications system.

FIG. 1 illustrates an example wireless network according to embodimentsof the present disclosure. The embodiment of the wireless network shownin FIG. 1 is for illustration only. Other embodiments of the wirelessnetwork 100 could be used without departing from the scope of thisdisclosure.

As shown in FIG. 1, the wireless network includes a gNB 101, a gNB 102,and a gNB 103. The gNB 101 communicates with the gNB 102 and the gNB103. The gNB 101 also communicates with at least one network 130, suchas the Internet, a proprietary Internet Protocol (IP) network, or otherdata network.

The gNB 102 provides wireless broadband access to the network 130 for afirst plurality of user equipments (UEs) within a coverage area 120 ofthe gNB 102. The first plurality of UEs includes a UE 111, which may belocated in a small business (SB); a UE 112, which may be located in anenterprise (E); a UE 113, which may be located in a WiFi hotspot (HS); aUE 114, which may be located in a first residence (R); a UE 115, whichmay be located in a second residence (R); and a UE 116, which may be amobile device (M), such as a cell phone, a wireless laptop, a wirelessPDA, or the like. The gNB 103 provides wireless broadband access to thenetwork 130 for a second plurality of UEs within a coverage area 125 ofthe gNB 103. The second plurality of UEs includes the UE 115 and the UE116. In some embodiments, one or more of the gNBs 101-103 maycommunicate with each other and with the UEs 111-116 using 5G/NR, LTE,LTE-A, WiMAX, WiFi, or other wireless communication techniques.

Depending on the network type, the term “base station” or “BS” or ‘gNB’can refer to any component (or collection of components) configured toprovide wireless access to a network, such as transmit point (TP),transmit-receive point (TRP), an enhanced base station (eNodeB or eNB),a 5G/NR base station (gNB), a macrocell, a femtocell, a WiFi accesspoint (AP), or other wirelessly enabled devices. Base stations mayprovide wireless access in accordance with one or more wirelesscommunication protocols, e.g., 5G/NR 3GPP new radio interface/access(NR), long term evolution (LTE), LTE advanced (LTE-A), high speed packetaccess (HSPA), Wi-Fi 802.11a/b/g/n/ac, etc. For the sake of convenience,the terms “BS”/“gNB” and “TRP” are used interchangeably in this patentdocument to refer to network infrastructure components that providewireless access to remote terminals. Also, depending on the networktype, the term “user equipment” or “UE” can refer to any component suchas “mobile station,” “subscriber station,” “remote terminal,” “wirelessterminal,” “receive point,” or “user device.” For the sake ofconvenience, the terms “user equipment” and “UE” are used in this patentdocument to refer to remote wireless equipment that wirelessly accessesa BS, whether the UE is a mobile device (such as a mobile telephone orsmartphone) or is normally considered a stationary device (such as adesktop computer or vending machine).

Dotted lines show the approximate extents of the coverage areas 120 and125, which are shown as approximately circular for the purposes ofillustration and explanation only. It should be clearly understood thatthe coverage areas associated with gNBs, such as the coverage areas 120and 125, may have other shapes, including irregular shapes, dependingupon the configuration of the gNBs and variations in the radioenvironment associated with natural and man-made obstructions.

As described in more detail below, one or more of the UEs 111-116include circuitry, programing, or a combination thereof, for efficientsignaling of control information in an advanced wireless communicationsystem. In certain embodiments, and one or more of the gNBs 101-103includes circuitry, programing, or a combination thereof, for efficientsignaling of control information in an advanced wireless communicationsystem.

Although FIG. 1 illustrates one example of a wireless network, variouschanges may be made to FIG. 1. For example, the wireless network couldinclude any number of gNBs and any number of UEs in any suitablearrangement. Also, the gNB 101 could communicate directly with anynumber of UEs and provide those UEs with wireless broadband access tothe network 130. Similarly, each gNB 102-103 could communicate directlywith the network 130 and provide UEs with direct wireless broadbandaccess to the network 130. Further, the gNBs 101, 102, and/or 103 couldprovide access to other or additional external networks, such asexternal telephone networks or other types of data networks.

FIG. 2 illustrates an example gNB 102 according to embodiments of thepresent disclosure. The embodiment of the gNB 102 illustrated in FIG. 2is for illustration only, and the gNBs 101 and 103 of FIG. 1 could havethe same or similar configuration. However, gNBs come in a wide varietyof configurations, and FIG. 2 does not limit the scope of thisdisclosure to any particular implementation of an gNB.

As shown in FIG. 2, the gNB 102 includes multiple antennas 205 a-205 n,multiple RF transceivers 210 a-210 n, transmit (TX) processing circuitry215, and receive (RX) processing circuitry 220. The gNB 102 alsoincludes a controller/processor 225, a memory 230, and a backhaul ornetwork interface 235.

The RF transceivers 210 a-210 n receive, from the antennas 205 a-205 n,incoming RF signals, such as signals transmitted by UEs in the network100. The RF transceivers 210 a-210 n down-convert the incoming RFsignals to generate IF or baseband signals. The IF or baseband signalsare sent to the RX processing circuitry 220, which generates processedbaseband signals by filtering, decoding, and/or digitizing the basebandor IF signals. The RX processing circuitry 220 transmits the processedbaseband signals to the controller/processor 225 for further processing.

The TX processing circuitry 215 receives analog or digital data (such asvoice data, web data, e-mail, or interactive video game data) from thecontroller/processor 225. The TX processing circuitry 215 encodes,multiplexes, and/or digitizes the outgoing baseband data to generateprocessed baseband or IF signals. The RF transceivers 210 a-210 nreceive the outgoing processed baseband or IF signals from the TXprocessing circuitry 215 and up-converts the baseband or IF signals toRF signals that are transmitted via the antennas 205 a-205 n.

The controller/processor 225 can include one or more processors or otherprocessing devices that control the overall operation of the gNB 102.For example, the controller/processor 225 could control the reception offorward channel signals and the transmission of reverse channel signalsby the RF transceivers 210 a-210 n, the RX processing circuitry 220, andthe TX processing circuitry 215 in accordance with well-knownprinciples. The controller/processor 225 could support additionalfunctions as well, such as more advanced wireless communicationfunctions. For instance, the controller/processor 225 could support beamforming or directional routing operations in which outgoing signals frommultiple antennas 205 a-205 n are weighted differently to effectivelysteer the outgoing signals in a desired direction. Any of a wide varietyof other functions could be supported in the gNB 102 by thecontroller/processor 225.

The controller/processor 225 is also capable of executing programs andother processes resident in the memory 230, such as an OS. Thecontroller/processor 225 can move data into or out of the memory 230 asrequired by an executing process.

The controller/processor 225 is also coupled to the backhaul or networkinterface 235. The backhaul or network interface 235 allows the gNB 102to communicate with other devices or systems over a backhaul connectionor over a network. The interface 235 could support communications overany suitable wired or wireless connection(s). For example, when the gNB102 is implemented as part of a cellular communication system (such asone supporting 5G/NR, LTE, or LTE-A), the interface 235 could allow thegNB 102 to communicate with other gNBs over a wired or wireless backhaulconnection. When the gNB 102 is implemented as an access point, theinterface 235 could allow the gNB 102 to communicate over a wired orwireless local area network or over a wired or wireless connection to alarger network (such as the Internet). The interface 235 includes anysuitable structure supporting communications over a wired or wirelessconnection, such as an Ethernet or RF transceiver.

The memory 230 is coupled to the controller/processor 225. Part of thememory 230 could include a RAM, and another part of the memory 230 couldinclude a Flash memory or other ROM.

Although FIG. 2 illustrates one example of gNB 102, various changes maybe made to FIG. 2. For example, the gNB 102 could include any number ofeach component shown in FIG. 2. As a particular example, an access pointcould include a number of interfaces 235, and the controller/processor225 could support routing functions to route data between differentnetwork addresses. As another particular example, while shown asincluding a single instance of TX processing circuitry 215 and a singleinstance of RX processing circuitry 220, the gNB 102 could includemultiple instances of each (such as one per RF transceiver). Also,various components in FIG. 2 could be combined, further subdivided, oromitted and additional components could be added according to particularneeds.

FIG. 3 illustrates an example UE 116 according to embodiments of thepresent disclosure. The embodiment of the UE 116 illustrated in FIG. 3is for illustration only, and the UEs 111-115 of FIG. 1 could have thesame or similar configuration. However, UEs come in a wide variety ofconfigurations, and FIG. 3 does not limit the scope of this disclosureto any particular implementation of a UE.

As shown in FIG. 3, the UE 116 includes an antenna 305, a radiofrequency (RF) transceiver 310, TX processing circuitry 315, amicrophone 320, and receive (RX) processing circuitry 325. The UE 116also includes a speaker 330, a processor 340, an input/output (I/O)interface (IF) 345, a touchscreen 350, a display 355, and a memory 360.The memory 360 includes an operating system (OS) 361 and one or moreapplications 362.

The RF transceiver 310 receives, from the antenna 305, an incoming RFsignal transmitted by a gNB of the network 100. The RF transceiver 310down-converts the incoming RF signal to generate an intermediatefrequency (IF) or baseband signal. The IF or baseband signal is sent tothe RX processing circuitry 325, which generates a processed basebandsignal by filtering, decoding, and/or digitizing the baseband or IFsignal. The RX processing circuitry 325 transmits the processed basebandsignal to the speaker 330 (such as for voice data) or to the processor340 for further processing (such as for web browsing data).

The TX processing circuitry 315 receives analog or digital voice datafrom the microphone 320 or other outgoing baseband data (such as webdata, e-mail, or interactive video game data) from the processor 340.The TX processing circuitry 315 encodes, multiplexes, and/or digitizesthe outgoing baseband data to generate a processed baseband or IFsignal. The RF transceiver 310 receives the outgoing processed basebandor IF signal from the TX processing circuitry 315 and up-converts thebaseband or IF signal to an RF signal that is transmitted via theantenna 305.

The processor 340 can include one or more processors or other processingdevices and execute the OS 361 stored in the memory 360 in order tocontrol the overall operation of the UE 116. For example, the processor340 could control the reception of forward channel signals and thetransmission of reverse channel signals by the RF transceiver 310, theRX processing circuitry 325, and the TX processing circuitry 315 inaccordance with well-known principles. In some embodiments, theprocessor 340 includes at least one microprocessor or microcontroller.

The processor 340 is also capable of executing other processes andprograms resident in the memory 360, such as processes for beammanagement. The processor 340 can move data into or out of the memory360 as required by an executing process. In some embodiments, theprocessor 340 is configured to execute the applications 362 based on theOS 361 or in response to signals received from gNBs or an operator. Theprocessor 340 is also coupled to the I/O interface 345, which providesthe UE 116 with the ability to connect to other devices, such as laptopcomputers and handheld computers. The I/O interface 345 is thecommunication path between these accessories and the processor 340.

The processor 340 is also coupled to the touchscreen 350 and the display355. The operator of the UE 116 can use the touchscreen 350 to enterdata into the UE 116. The display 355 may be a liquid crystal display,light emitting diode display, or other display capable of rendering textand/or at least limited graphics, such as from web sites.

The memory 360 is coupled to the processor 340. Part of the memory 360could include a random access memory (RAM), and another part of thememory 360 could include a Flash memory or other read-only memory (ROM).

Although FIG. 3 illustrates one example of UE 116, various changes maybe made to FIG. 3. For example, various components in FIG. 3 could becombined, further subdivided, or omitted and additional components couldbe added according to particular needs. As a particular example, theprocessor 340 could be divided into multiple processors, such as one ormore central processing units (CPUs) and one or more graphics processingunits (GPUs). Also, while FIG. 3 illustrates the UE 116 configured as amobile telephone or smartphone, UEs could be configured to operate asother types of mobile or stationary devices.

To meet the demand for wireless data traffic having increased sincedeployment of 4G communication systems, efforts have been made todevelop an improved 5G/NR or pre-5G/NR communication system. Therefore,the 5G/NR or pre-5G/NR communication system is also called a “beyond 4Gnetwork” or a “post LTE system.” The 5G/NR communication system isconsidered to be implemented in higher frequency (mmWave) bands, e.g.,60 GHz bands, so as to accomplish higher data rates. To decreasepropagation loss of the radio waves and increase the transmissiondistance, the beamforming, massive multiple-input multiple-output(MIMO), full dimensional MIMO (FD-MIMO), array antenna, an analog beamforming, large scale antenna techniques are discussed in 5G/NRcommunication systems. In addition, in 5G/NR communication systems,development for system network improvement is under way based onadvanced small cells, cloud radio access networks (RANs), ultra-densenetworks, device-to-device (D2D) communication, wireless backhaul,moving network, cooperative communication, coordinated multi-points(CoMP), reception-end interference cancellation and the like. In the5G/NR system, Hybrid FSK and QAM modulation (FQAM) and sliding windowsuperposition coding (SWSC) as an advanced coding modulation (ACM), andfilter bank multi carrier (FBMC), non-orthogonal multiple access (NOMA),and sparse code multiple access (SCMA) as an advanced access technologyhave been developed.

A communication system includes a downlink (DL) that refers totransmissions from a base station or one or more transmission points toUEs and an uplink (UL) that refers to transmissions from UEs to a basestation or to one or more reception points.

A time unit for DL signaling or for UL signaling on a cell is referredto as a slot and can include one or more slot symbols. A slot symbol canalso serve as an additional time unit. A frequency (or bandwidth (BW))unit is referred to as a resource block (RB). One RB includes a numberof sub-carriers (SCs). For example, a slot can have duration of 0.5milliseconds or 1 millisecond, include 14 symbols and an RB can have aBW of 180 KHz and include 12 SCs with inter-SC spacing of 15 KHz or 30KHz, and so on.

DL signals include data signals conveying information content, controlsignals conveying DL control information (DCI), and reference signals(RS) that are also known as pilot signals. A gNB transmits datainformation or DCI through respective physical DL shared channels(PDSCHs) or physical DL control channels (PDCCHs). A PDSCH or a PDCCHcan be transmitted over a variable number of slot symbols including oneslot symbol.

A gNB transmits one or more of multiple types of RS including channelstate information RS (CSI-RS) and demodulation RS (DMRS). A CSI-RS isprimarily intended for UEs to perform measurements and provide channelstate information (CSI) to the gNB. For channel measurement, non-zeropower CSI-RS (NZP CSI-RS) resources are used. For interferencemeasurement reports (IMRs), CSI interference measurement (CSI-IM)resources associated with a zero power CSI-RS (ZP CSI-RS) configurationare used. A CSI process consists of NZP CSI-RS and CSI-IM resources.

A UE can determine CSI-RS transmission parameters through DL controlsignaling or higher layer signaling, such as radio resource control(RRC) signaling from a gNB. A DMRS is transmitted in the BW of arespective PDCCH or PDSCH and a UE can use the DMRS to demodulate dataor control information.

FIG. 4 illustrates an example DL slot structure 400 according toembodiments of the present disclosure. The embodiment of the DL slotstructure 400 illustrated in FIG. 4 is for illustration only and couldhave the same or similar configuration. FIG. 4 does not limit the scopeof this disclosure to any particular implementation.

A DL slot 410 includes N_(symb) ^(DL) symbols 420 where a gNB cantransmit data information, DCI, or DMRS. A DL system BW includes N_(RB)^(DL) RBs. Each RB includes N_(sc) ^(RB) SCs. A UE is assigned M_(PDSCH)RBs for a total of M_(sc) ^(PDSCH)=M_(PDSCH)·N_(sc) ^(RB) SCs 430 for aPDSCH transmission BW. A PDCCH conveying DCI is transmitted over controlchannel elements (CCEs) that are substantially spread across the DLsystem BW. A first slot symbol 440 can be used by the gNB to transmitPDCCH. A second slot symbol 450 can be used by the gNB to transmit PDCCHor PDSCH. Remaining slot symbols 460 can be used by the gNB to transmitPDSCH and CSI-RS. In some slots, the gNB can also transmitsynchronization signals and channels that convey system information.

UL signals also include data signals conveying information content,control signals conveying UL control information (UCI), DMRS associatedwith data or UCI demodulation, sounding RS (SRS) enabling a gNB toperform UL channel measurement, and a random access (RA) preambleenabling a UE to perform random access. A UE transmits data informationor UCI through a respective physical UL shared channel (PUSCH) or aphysical UL control channel (PUCCH). A PUSCH or a PUCCH can betransmitted over a variable number of slot symbols including one slotsymbol. When a UE simultaneously transmits data information and UCI, theUE can multiplex both in a PUSCH and drop a PUCCH transmission.

UCI includes hybrid automatic repeat request acknowledgement (HARQ-ACK)information, indicating correct or incorrect detection of data transportblocks (TB s) in a PDSCH, scheduling request (SR) indicating whether aUE has data in the UE's buffer, and CSI reports enabling a gNB to selectappropriate parameters for PDSCH or PDCCH transmissions to a UE.HARQ-ACK information can be configured to be with a smaller granularitythan per TB and can be per data code block (CB) or per group of data CBswhere a data TB includes a number of data CBs.

A CSI report from a UE can include a channel quality indicator (CQI)informing a gNB of a largest modulation and coding scheme (MCS) for theUE to detect a data TB with a predetermined block error rate (BLER),such as a 10% BLER, of a precoding matrix indicator (PMI) informing agNB how to combine signals from multiple transmitter antennas inaccordance with a multiple input multiple output (MIMO) transmissionprinciple, and of a rank indicator (RI) indicating a transmission rankfor a PDSCH.

UL RS includes DMRS and SRS. DMRS is transmitted only in a BW of arespective PUSCH or PUCCH transmission. A gNB can use a DMRS todemodulate information in a respective PUSCH or PUCCH. SRS istransmitted by a UE to provide a gNB with an UL CSI and, for a TDDsystem, an SRS transmission can also provide a PMI for DL transmission.Additionally, in order to establish synchronization or an initial higherlayer connection with a gNB, a UE can transmit a physical random accesschannel (PRACH).

FIG. 5 illustrates an example UL slot structure 500 for PUSCHtransmission or PUCCH transmission according to embodiments of thepresent disclosure. The embodiment of the UL slot structure 500illustrated in FIG. 5 is for illustration only and could have the sameor similar configuration. FIG. 5 does not limit the scope of thisdisclosure to any particular implementation.

As shown in FIG. 5, a slot 510 includes N_(symb) ^(UL) symbols 520 whereUE transmits data information, UCI, or DMRS. An UL system BW includesN_(RB) ^(UL) RBs. Each RB includes N_(sc) ^(RB) SCs. A UE is assignedM_(PUXCH) RBs for a total of M_(sc) ^(PUXCH)=M_(PUXCH)·N_(sc) ^(RB) SCs530 for a PUSCH transmission BW (“X”=“S”) or for a PUCCH transmission BW(“X”=“C”). Last one or more slot symbols can be used to multiplex SRStransmissions 550 or short PUCCH transmissions from one or more UEs.

A number of UL slot symbols available for data/UCI/DMRS transmission isN_(symb) ^(PUXCH)=2·(N_(symb) ^(UL)−1)−N_(SRS), where N_(SRS) is anumber of slot symbols used for SRS transmission. Therefore, a number oftotal REs for a PUXCH transmission is M_(sc) ^(PUXCH)·N_(symb) ^(PUXCH).PUCCH transmission and PUSCH transmission can also occur in a same slot;for example, a UE can transmit PUSCH in the earlier slot symbols andPUCCH in the later slot symbols and then slot symbols used for PUCCH arenot available for PUSCH and the reverse.

A hybrid slot includes a DL transmission region, a guard period region,and an UL transmission region, similar to a special subframe in LTEspecification. For example, a DL transmission region can contain PDCCHand PDSCH transmissions and an UL transmission region can contain PUCCHtransmissions. For example, a DL transmission region can contain PDCCHtransmissions and an UL transmission region can contain PUSCH and PUCCHtransmissions.

DL transmissions and UL transmissions can be based on an orthogonalfrequency division multiplexing (OFDM) waveform including a variantusing DFT preceding that is known as DFT-spread-OFDM.

A UE typically monitors multiple candidate locations for respectivepotential PDCCH receptions to decode DCI formats in a slot. A DCI formatincludes cyclic redundancy check (CRC) bits in order for the UE toconfirm a correct detection of the DCI format. A DCI format type isidentified by a radio network temporary identifier (RNTI) that scramblesthe CRC bits. For a DCI format scheduling a PDSCH or a PUSCH to a singleUE, the RNTI can be a cell RNTI (C-RNTI), or variants of a C-RNTI suchas a CS-RNTI or a MCS-C-RNTI, and serves as a UE identifier. For a DCIformat scheduling a PDSCH conveying system information (SI), the RNTIcan be an SI-RNTI. For a DCI format scheduling a PDSCH providing arandom access response (RAR), the RNTI can be a RA-RNTI. For a DCIformat providing TPC commands, the RNTI can be a TPC-PUSCH-RNTI,TPC-PUCCH-RNTI, or TPC-SRS-RNTI to respectively associate TPC commandvalues with a transmission power of a PUSCH, PUCCH, or SRS. Each RNTItype can be configured to a UE through higher-layer signaling such asRRC signaling. A DCI format scheduling PDSCH transmission to a UE isalso referred to as DL DCI format or DL assignment while a DCI formatscheduling PUSCH transmission from a UE is also referred to as UL DCIformat or UL grant.

FIG. 6 illustrates an example encoding process 600 for DCI formataccording to embodiments of the present disclosure. An embodiment of theencoding process 600 for the DCI format shown in FIG. 6 is forillustration only. Other embodiments may be used without departing fromthe scope of the present disclosure.

A gNB separately encodes and transmits each DCI format in a respectivePDCCH. A RNTI masks a CRC of the DCI format codeword in order to enablea UE to identify the DCI format. For example, the CRC and the RNTI caninclude 16 bits. The CRC of (non-coded) DCI format bits 610 isdetermined using a CRC computation unit 620, and the CRC is masked usingan exclusive OR (XOR) operation unit 8630 between CRC bits and RNTI bits640. The XOR operation is defined as XOR(0,0)=0, XOR(0,1)=1, XOR(1,0)=1,XOR(1,1)=0. The masked CRC bits are appended to DCI format informationbits using a CRC append unit 650. An encoder 660 performs channel coding(such as tail-biting convolutional coding or polar coding), followed byrate matching to allocated resources by rate matcher 670. Interleavingand modulation units 680 apply interleaving and modulation, such asQPSK, and the output control signal 690 is transmitted.

FIG. 7 illustrates an example reception and decoding process 700 for aDCI format for use with a UE according to embodiments of the presentdisclosure. An embodiment of the decoding process 700 for the DCI formatfor use with the UE shown in FIG. 7 is for illustration only. Otherembodiments may be used without departing from the scope of the presentdisclosure.

A received control signal 710 is demodulated and de-interleaved by ademodulator and a de-interleaver 720. A rate matching applied at a gNBtransmitter is restored by rate matcher 730, and resulting bits aredecoded by decoder 740. After decoding, a CRC extractor 750 extracts CRCbits and provides DCI format information bits 760. The DCI formatinformation bits are de-masked 770 by an XOR operation with a RNTI 780(when applicable) and a CRC check is performed by unit 790. When the CRCcheck succeeds (check-sum is zero), the DCI format information bits areconsidered to be valid. When the CRC check does not succeed, the DCIformat information bits are considered to be invalid.

A UE can transmit HARQ-ACK in a PUCCH or in a PUSCH that corresponds tomultiple PDSCH receptions by the UE. The UE can determine a HARQ-ACKinformation payload that corresponds either to all non-overlapping PDSCHreceptions that the UE can transmit respective HARQ-ACK information in asame PUSCH or PUCCH (semi-static HARQ-ACK codebook) or based on DLassignment indicator (DAI) fields that are included in a DCI formatscheduling a PDSCH reception to the UE or in a DCI format scheduling aPUSCH transmission from the UE (dynamic HARQ-ACK codebook). When a UEhas multiple scheduled PUSCH transmissions, it is beneficial for areception reliability of HARQ-ACK information or data information toprovide means for a UE to determine one of the PUSCH transmissions tomultiplex HARQ-ACK information or, in general, UCI.

When a UE transmits HARQ-ACK bits in a PUSCH, the UE determines a numberof coded modulation symbols per layer Q′ for HARQ-ACK as in equation 1.

                                      equation  1$Q_{ACK}^{\prime} = {\min\{ {\lceil \frac{( {O_{ACK} + L} ) \cdot M_{sc}^{PUSCH} \cdot N_{symb}^{PUSCH} \cdot \beta_{offset}^{PUSCH}}{\sum\limits_{r = 0}^{C_{{UL} - {SCH}} - 1}K_{r}} \rceil,{\sum\limits_{l = 0}^{N_{{symb},{all}}^{PUSCH} - 1}{M_{sc}^{\Phi^{UCI}}(l)}}} \}}$where O_(ACK) is the number of HARQ-ACK bits; L is the number of CRCbits, if any; M_(sc) ^(PUSCH) is the scheduled bandwidth of the PUSCHtransmission, expressed as a number of subcarriers; N_(symb) ^(PUSCH) isthe number of symbols of the PUSCH transmission, excluding all symbolsused for DMRS; β_(offset) ^(PUSCH)=β_(offset) ^(HARQ-ACK); C_(UL-SCH) isa number of code blocks for UL-SCH in the PUSCH transmission; K_(r) isthe r-th code block size for UL-SCH in the PUSCH transmission; M_(sc)^(PT-RS) is the number of subcarriers in a symbol that carries PTRS inthe PUSCH transmission; N_(symb) ^(PTRS) is the number of symbols thatcarry PTRS, in the PUSCH transmission; M_(sc) ^(Φ) ^(UCI) (l)=|Φ_(l)^(UCI)| is the number of elements in set Φ_(l) ^(UCI), where Φ_(l)^(UCI) is the set of resource elements available for transmission of UCIin symbol l, for l=0, 1, 2, . . . , N_(symb,all) ^(PUSCH)−1, andN_(symb,all) ^(PUSCH) is the total number of symbols of the PUSCH; and ┌┐ is the ceiling function that rounds a number to a next higher integer.

When a UE transmits CSI part 1 in a PUSCH, the UE determines a number ofcoded modulation symbols per layer Q′_(CSI,1) as in equation 2.

                                     equation  2$Q_{{CSI},1}^{\prime} = {\min\{ {\lceil \frac{( {O_{{CSI},1} + L} ) \cdot M_{sc}^{PUSCH} \cdot N_{symb}^{PUSCH} \cdot \beta_{offset}^{PUSCH}}{\sum\limits_{r = 0}^{C_{{UL} - {SCH}} - 1}K_{r}} \rceil,( {( {\sum\limits_{l = 0}^{N_{{symb},{all}}^{PUSCH} - 1}{M_{sc}^{\Phi^{UCI}}(l)}} ) - Q_{ACK}^{\prime}} )} \}}$where O_(CSI,1) is the number of bits for CSI part 1; L is the number ofCRC bits, when any, for coding of CSI part 1; β_(offset)^(PUSCH)=β_(offset) ^(CSI-part1); and Q′_(ACK) is the number of codedmodulation symbols per layer for HARQ-ACK transmitted on the PUSCH ifnumber of HARQ-ACK information bits is more than 2, and

$Q_{ACK}^{\prime} = {\sum\limits_{l = 0}^{N_{{symb},{all}}^{PUSCH} - 1}{{\overset{\_}{M}}_{{sc},{rvd}}^{\overset{\_}{\Phi}}(l)}}$if the number of HARQ-ACK information bits is 1 or 2 bits, where Φ _(l)^(rvd) is the set of reserved resource elements for potential HARQ-ACKtransmission in symbol l, for l=0, 1, 2, . . . , N_(symb,all) ^(PUSCH)−1and M _(sc,rvd) ^(Φ) (l)=|Φ _(l) ^(rvd)| is the number of elements in Φ_(l) ^(rvd). Remaining notation is similar to the one described forHARQ-ACK and is not described for brevity.

When a UE transmits CSI part 2 in a PUSCH, the UE determines a number ofcoded modulation symbols per layer Q′_(CSI,1) as in equation 3.

$\begin{matrix}{Q_{{CSI},2}^{\prime} = {\min\{ {\lceil \frac{( {O_{{CSI},2} + L} ) \cdot M_{sc}^{PUSCH} \cdot N_{symb}^{PUSCH} \cdot \beta_{offset}^{PUSCH}}{\sum\limits_{r = 0}^{C_{{UL} - {SCH}} - 1}\; K_{r}} \rceil,( {( {\sum\limits_{l = 0}^{N_{{symb},{all}}^{PUSCH} - 1}\;{M_{sc}^{\Phi^{UCI}}(l)}} ) - Q_{ACK}^{\prime} - Q_{{CSI},1}^{\prime}} )} \}}} & {{equation}\mspace{14mu} 3}\end{matrix}$where O_(CSI,2) is the number of bits for CSI part 2, if any; L is thenumber of CRC bits for CSI part 2 coding; β_(offset) ^(PUSCH)=β_(offset)^(CSI-part2); Q′_(ACK) is the number of coded modulation symbols perlayer for HARQ-ACK transmitted on the PUSCH if number of HARQ-ACKinformation bits is more than 2, and O′_(ACK)=0 if the number ofHARQ-ACK information bits is 1 or 2 bits; and Q′_(CSI,1) is the numberof coded modulation symbols per layer for CSI part 1 transmitted on thePUSCH. Remaining notation is similar to the one described for HARQ-ACKand is not described for brevity.

For UCI multiplexing in a PUSCH, HARQ-ACK coded modulation symbolspuncture data coded modulation symbols or CSI part 2 coded modulationsymbols when the HARQ-ACK payload is 1 or 2 bits and are rate matchedwith data coded modulation symbols or with CSI part 2 coded modulationsymbols, respectively, when the HARQ-ACK payload is more than 2 bits. Aset Φ _(l) ^(rvd) of REs are reserved in symbol l for potential HARQ-ACKtransmission.

A PUSCH transmission can convey only A-CSI, and can also includeHARQ-ACK, without including any UL-SCH data information. When a UEmultiplexes only UCI (without UL-SCH data information) in a PUSCHtransmission and the UE also transmits HARQ-ACK information bits, the UEdetermines a number of coded symbols Q′ for HARQ-ACK as in equation 4where β_(offset) ^(PUSCH)=β_(offset) ^(HARQ-ACK)/β_(offset) ^(CSI-part1)and the remaining of the notation is as previously described:

$\begin{matrix}{Q_{ACK}^{\prime} = {\min\{ {\lceil \frac{( {O_{ACK} + L} ) \cdot M_{sc}^{PUSCH} \cdot N_{symb}^{PUSCH} \cdot \beta_{offset}^{PUSCH}}{O_{{CSI},1}} \rceil,{\sum\limits_{l = 0}^{N_{{symb},{all}}^{PUSCH} - 1}\;{M_{sc}^{\Phi^{UCI}}(l)}}} \}}} & {{equation}\mspace{14mu} 4}\end{matrix}$

A determination of a number of coded modulation symbols for a UCI typeper layer Q′ is based on a single respective β_(offset) ^(PUSCH) that agNB configures to a UE either by higher layer signaling or indicates toa UE with a field in a DCI format scheduling the PUSCH transmission froma set of predetermined β_(offset) ^(PUSCH) values such as for examplewith a field of 2 bits indicating one out of four predeterminedβ_(offset) ^(PUSCH) values.

In case data information is not multiplexed in a PUSCH transmission,using equation 4 to derive a number of HARQ-ACK coded modulation symbolscan result to a significant over-dimensioning as O_(CSI,1) does notreflect the total CSI payload and, if a set of β_(offset) ^(HARQ-ACK)values that is provided by higher layers is used, for example accordingto the HARQ-ACK payload, the β_(offset) ^(HARQ-ACK) values can besignificantly larger than necessary, for example by an order ofmagnitude, as β_(offset) ^(HARQ-ACK) values are typically selected forHARQ-ACK multiplexing in a PUSCH that includes data information and as atarget BLER for data information is typically significantly larger thana target BLER for CSI. It is noted that for a given HARQ-ACK informationtarget BLER, a β_(offset) ^(HARQ-ACK) value is typically inverselyproportional to the target BLER of the information type (data or CSI)serving as reference for determining a number of HARQ-ACK codedmodulation symbols.

FIG. 8 illustrates an example transmitter block diagram 800 for datainformation and UCI in a PUSCH according to embodiments of the presentdisclosure. The embodiment of the transmitter block diagram 800illustrated in FIG. 8 is for illustration only and could have the sameor similar configuration. FIG. 8 does not limit the scope of thisdisclosure to any particular implementation.

Referring to FIG. 8, coded CSI information bits 805, when any, codedHARQ-ACK information bits 810, when any, and coded data information bits820, when any, are multiplexed by multiplexer 830. Coded HARQ-ACKmodulation symbols, when any, puncture data and/or CSI modulationsymbols when a number of HARQ-ACK bits is less than 2 and are ratematched with data and/or CSI modulation symbols when a number ofHARQ-ACK bits is more than 2. A number of HARQ-ACK or CSI codedmodulation symbols can be determined by a processor (not shown), forexample as in equation 1 through equation 3. When a DFT-S-OFDM waveformis used for transmission, a discrete Fourier transform (DFT) is appliedby DFT unit 840 (no DFT is applied in case of an OFDM waveform), REs 850corresponding to a PUSCH transmission BW are selected by selector 855,an IFFT is performed by IFFT unit 860, an output is filtered and byfilter 870 and applied a certain power by power amplifier (PA) 880 and asignal is then transmitted 890. If any of data information, CSI, orHARQ-ACK information is not multiplexed, a block in FIG. 8 correspondingto a respective transmitter processing function is omitted. For brevity,additional transmitter circuitry such as digital-to-analog converter,filters, amplifiers, and transmitter antennas as well as encoders andmodulators for data symbols and UCI symbols are omitted for brevity.

FIG. 9 illustrates an example receiver block diagram 900 for datainformation and UCI in a PUSCH according to embodiments of the presentdisclosure. The embodiment of the receiver block diagram 900 illustratedin FIG. 9 is for illustration only and could have the same or similarconfiguration. FIG. 9 does not limit the scope of this disclosure to anyparticular implementation.

Referring to FIG. 9, a received signal 910 is filtered by filter 920, anFFT is applied by FFT unit 930, a selector unit 940 selects REs 950 usedby a transmitter, an inverse DFT (IDFT) unit applies an IDFT 960 when aDFT-S-OFDM waveform is used for transmission, and a de-multiplexer 970separates coded CSI information bits 980, if any, coded HARQ-ACKinformation bits, if any, 985 and coded data information bits, if any,990 prior to providing them to respective decoders. A number of HARQ-ACKor CSI coded modulation symbols can be determined by a processor (notshown), for example as in equation 1 through equation 3. Additionalreceiver circuitry such as a channel estimator, demodulators anddecoders for data and UCI symbols are not shown for brevity.

Transmitter and receiver structures for a PUCCH depend on a PUCCH formatand can be similar to the ones for a PUSCH (without existence of datainformation). For example, for a first PUCCH format, transmitter andreceiver structures can be as respective ones in FIG. 8 and FIG. 9 whilefor a second PUCCH format an orthogonal cover code can apply prior tothe DFT filter in FIG. 8 or after the IDFT filer in FIG. 9.Corresponding descriptions are known in the art and are omitted forbrevity.

When a UE transmits HARQ-ACK information in a PUCCH in response to PDSCHreceptions scheduled by associated DCI formats, a corresponding PUCCHresource can be indicated by a PUCCH resource indicator field in each ofthe DCI formats. A PUCCH resource can include several parametersdepending on a respective PUCCH format. For example, for a PUCCHtransmission, a PUCCH resource can include an index of a first symbol ina slot, a number of symbols in the slot, and an index of a first RBbefore frequency hopping and, if applicable, an index of a first RBafter frequency hopping.

To avoid increasing a number of bits for a PUCCH resource indicatorfield, an explicit PUCCH resource indication can be complemented with animplicit PUCCH resource indication. For example, when a UE is configureda set of four PUCCH resources, a PUCCH resource indicator field of 2bits can be used to indicate a PUCCH resource from the set of four PUCCHresources and an implicit determination is not applicable while when aUE is configured a set of more than four PUCCH resources, a PUCCHresource indicator field of 2 bits can be used to indicate a sub-setfrom the set of PUCCH resources and an implicit determination for aPUCCH resource from the sub-set of PUCCH resources can additionallyapply.

A PUCCH can be transmitted according to one from multiple PUCCH formats.A PUCCH format corresponds to a structure that is designed for a maximumnumber of symbols or for particular UCI payload range as different UCIpayloads require different PUCCH transmission structures to improve anassociated UCI BLER. A PUCCH transmission is also associated with atransmission configuration indicator (TCI) state providing a spatialdomain filter for a PUCCH transmission.

One important characteristic of 5G networks is a flexibility providedfor a number of UL symbols in a slot and a use of various sub-carrierspacing (SCS) values, such as 15 kilo-Hertz (kHz), 60 kHz, and so on. Anexistence of few UL symbols in a slot or a use of larger SCS valuesresults to a reduced total received energy for a PUCCH transmissionrelative to a slot that includes only UL symbols or relative to a use ofa smaller SCS value. To circumvent this problem and enable reliablereceptions of PUCCH transmissions, a UE can be configured by higherlayers a number of repetitions for a PUCCH transmission over acorresponding number of slots.

When a UE is not power limited, the UE can compensate for a reducednumber of slot symbols for a PUCCH transmission or for a higher SCS byincreasing a PUCCH transmission power. For example, in PUCCHtransmission occasion i, a UE can determine a PUCCH transmission powerP_(PUCCH,b,f,c)(i,q_(u),q_(d),l) on an active UL BWP b of carrier f in acell c using PUCCH power control adjustment state with index l as inequation 5

$\begin{matrix}{{P_{{PUCCH},b,f,c}( {i,q_{u},q_{d},l} )} = {\min{\begin{Bmatrix}{{P_{{CMAX},f,c}(i)},} \\\begin{matrix}{{P_{{O\_{PUCCH}},b,f,c}( q_{u} )} + {10\;{\log_{10}( {2^{\mu} \cdot {M_{{RB},b,f,c}^{PUCCH}(i)}} )}} + {{PL}_{b,f,c}( q_{d} )} +} \\{{\Delta_{F\_{PUCCH}}(F)} + {\Delta_{{TF},b,f,c}(i)} + {g_{b,f,c}( {i,l} )}}\end{matrix}\end{Bmatrix}\mspace{14mu}\lbrack {{dB}\; m} \rbrack}}} & {{equation}\mspace{14mu} 5}\end{matrix}$where the corresponding parameters are described in 3GPP TS 38.213v15.1.0, “NR, Physical Layer Procedures for Control”, μ is the SCSconfiguration, and Δ_(TF,b,f,c)(i) is a PUCCH transmission poweradjustment that accounts for a number of available resources for thePUCCH transmission during occasion i.

For PUCCH format 1,

${{\Delta_{{TF},b,f,c}(i)} = {10\;{\log_{10}( \frac{N_{ref}^{PUCCH}}{N_{symb}^{PUCCH}} )}}},$where N_(ref) ^(PUCCH)=N_(symb) ^(slot), N_(symb) ^(slot) is a number ofsymbols per slot, and N_(symb) ^(PUCCH) is a number of PUCCHtransmission symbols in PUCCH transmission occasion i. For PUCCH format3 or PUCCH format 4 and for O_(UCI)=n_(HARQ-ACK)+O_(SR)+O_(CSI)≤11 bitsin PUCCH transmission occasion i, Δ_(TF,b,f,c)(i)=10log₁₀(K₁·(n_(HARQ-ACK)+O_(SR)+O_(CSI))/N_(RE)), where K₁=6, n_(HARQ-ACK)is a number of actual HARQ-ACK information bits that the UE determinesas described in REF 3, O_(SR) is a number of SR information bits,O_(CSI) is a number of CSI information bits, and N_(RE) is a number ofREs for UCI transmission. For PUCCH format 3 or PUCCH format 4 and forO_(UCI)=O_(HARQ-ACK)+O_(SR)+O_(CSI)>11 bits in PUCCH transmissionoccasion i, Δ_(TF,b,f,c)(i)=10 log₁₀((2^(K) ² ^(·BPRE)−1)), K₂=2.4,BPRE=(O_(ACK)+O_(SR)+O_(CSI)+O_(CRC))/N_(RE), and O_(ACK) is a totalnumber of HARQ-ACK information bits.

When a gNB determines that a UE cannot increase a transmission power toachieve a desired UCI reception reliability for a PUCCH transmissionover a number of symbols of a slot, the gNB can configure the UE with anumber of repetitions for a PUCCH transmission over a respective numberof slots in order to increase a time for a PUCCH reception and increasea total PUCCH reception energy. As a required PUCCH transmission powerdepends on a number of UCI bits included in the PUCCH, a number ofrepetitions for a PUCCH transmission from a UE that cannot increase aPUCCH transmission power should depend on the number of UCI bitsincluded in the PUCCH.

A PUCCH transmission with repetitions can include a single UCI type ormultiple UCI types. Having a single UCI type and not multiplexing otherUCI types in a PUCCH transmission, when corresponding PUCCHtransmissions that would include the UCI types overlap in time, avoidshaving to increase a number of PUCCH repetitions to accommodate a largerUCI payload and therefore reduces a reception latency for the single UCItype at the expense of the UE dropping transmission of the other UCItypes. Having multiple UCI types in a PUCCH transmission withrepetitions has the reverse tradeoffs of having a single UCI type in aPUCCH transmission with repetitions and dropping the other UCIs.

Different UCI types can also have different reception reliabilityrequirements. For example, a reception reliability for HARQ-ACKinformation can be 0.1% while a reception reliability for CSI can be 5%.Therefore, for a PUCCH transmission without repetitions, a PUCCHtransmission power can depend on the UCI type while, for a PUCCHtransmission with repetitions, a number of repetitions can depend on theUCI type.

Reception points at a gNB can dynamically change due to UE mobility ordue variations in a corresponding channel medium. For example, a currentbeam for a PUCCH reception can become suboptimal and a new beam may notbe immediately available thereby requiring a gNB to use a wider beam fora PUCCH reception and experience a reduced signal-to-noise andinterference ratio (SINR) for the PUCCH reception. For example, a PUCCHcan be dynamically received from one reception point or from multiplereception points and, in the latter case, a SINR for the PUCCH receptioncan increase. In order to enable a gNB to receive a UCI in a PUCCH witha desired reliability, the gNB can dynamically adjust a PUCCHtransmission power from the UE. When the UE is power limited, it isbeneficial for the gNB to be able to dynamically adjust a number ofrepetitions for a PUCCH transmission from the UE.

In addition to adjusting a power or a number of repetitions for a PUCCHtransmission depending on a UCI payload, a UE may drop some of the UCIwhen a total UCI payload and a number of PUCCH REs available for UCItransmission result to a code rate that is larger than a code rateprovided to the UE by higher layers. Then, the UE drops parts of UCI,such as part 2 CSI reports, until a resulting code rate is smaller thanor equal to the code rate provided by higher layers. When it is notpossible to further drop UCI, such as for example when the UE hasdropped all CSI reports and the remaining UCI includes only HARQ-ACKinformation and the resulting code rate remains larger than the coderate provided by higher layers, the UE transmits the UCI with theresulting code rate. Instead of the UE dropping UCI or potentiallyhaving to transmit UCI with a code rate that is larger than a code rateprovided by higher layers, it is beneficial to enable the UE to avoiddropping UCI or to enable the UE to transmit UCI with a code rate thatis smaller than or equal to the code rate provided by higher layers.

Another important characteristic of 5G networks is a flexibilityprovided for a timing of UL transmissions. A UE can be indicated by aDCI format scheduling a PDSCH reception or a release of asemi-persistently scheduled (SPS) PDSCH, a slot for transmission ofPUCCH conveying corresponding HARQ-ACK information. The UE can also beindicated a resource for the PUCCH transmission that includes a firstsymbol in the slot. Similar, a DCI format scheduling a PUSCHtransmission can indicate a corresponding slot and a first symbol withinthe slot for the PUSCH transmission. The UE can also have periodic orsemi-persistent PUSCH or PUCCH transmissions.

A UE may or may not be capable of simultaneously transmitting PUSCH andPUCCH in an UL bandwidth part (BWP) of a serving cell. When the UE isnot capable of simultaneously transmitting PUSCH and PUCCH, the UE dropsthe PUCCH transmissions and multiplexes corresponding UCI, such asHARQ-ACK information or CSI, in a PUSCH transmission. Also, a UE may ormay not be capable of simultaneously transmitting multiple PUCCHs in anUL bandwidth part (BWP) of a serving cell. When the UE is not capable ofsimultaneously transmitting multiple PUCCHs, the UE drops all PUCCHtransmissions except one PUCCH transmission where the UE multiplexes allUCI. A UE is expected to perform the above functionalities whencorresponding PUCCH or PUSCH transmissions start at a same symbol of asame slot. However, a UE is not generally capable of performing theabove functionalities when corresponding PUCCH or PUSCH transmissionsstart at different symbols of a same slot. Moreover, under certainconditions that relate to a UE processing time, the UE may not becapable of performing the above functionalities even when correspondingPUCCH or PUSCH transmissions start at a same symbol of a same slot.

When a UE is not capable of multiplexing UCI from multiple PUCCHtransmissions in a single PUCCH transmission or when the UE is notcapable of multiplexing UCI in a PUSCH transmission, the UE needs tofurther determine a PUCCH transmission to prioritize (or, equivalently,the one or more PUCCH transmissions to drop) or whether to prioritize aPUSCH transmission or a PUCCH transmission.

Therefore, there is a need to provide an accurate determination for anumber of HARQ-ACK coded modulation symbols in a PUSCH transmission thatdoes not include data information.

There is another need to provide mechanisms for a determination of aPUSCH for multiplexing UCI in case of multiple PUSCH transmissions.

There is another need to provide mechanisms for implicit determinationof a PUCCH resource in combination with an explicit determination of thePUCCH resource.

There is another need to determine an adjustment factor for a PUCCHtransmission power depending on a corresponding number of UCI bits or ona corresponding type of UCI bits.

There is another need to define the UE behavior in terms of conditionsfor multiplexing UCI in a same PUCCH or PUSCH transmission or, whenmultiplexing is not possible, for dropping a number of PUSCH or PUCCHtransmissions.

There is another need to define prioritization rules and a UE behaviorfor time-overlapped PUSCH or PUCCH transmissions.

There is another need to define a UE capability for a time a UE requiresto cancel a configured transmission.

There is another need to adjust a number of repetitions for a PUCCHtransmission based on a number of UCI bits conveyed by the PUCCHtransmission.

There is another need to enable use of a different power or of adifferent number of repetitions for a PUCCH transmission depending on aUCI type included by the PUCCH transmission.

There is another need to dynamically indicate a number of repetitionsfor a PUCCH transmission.

Finally, there is another need to enable a UE to avoid dropping UCI orto avoid transmitting UCI with a code rate that is larger than a coderate provided to the UE by higher layers.

The present disclosure relates to a pre-5^(th)-Generation (5G) or 5Gcommunication system to be provided for supporting higher data ratesbeyond 4^(th)-Generation (4G) communication system such as long termevolution (LTE). The present disclosure relates to providing an accuratedetermination for a number of HARQ-ACK coded modulation symbols in aPUSCH transmission that does not include data information. The presentdisclosure also relates to providing mechanisms for a determination of aPUSCH for multiplexing UCI in case of multiple PUSCH transmissions. Thepresent disclosure additionally relates to providing mechanisms forimplicit determination of a PUCCH resource in combination with anexplicit determination of the PUCCH resource. The present disclosurefurther relates to determining an adjustment factor for a PUCCHtransmission power depending on a corresponding number of UCI bits or ona corresponding type of UCI bits. The present disclosure also relates todefining a UE behavior in terms of conditions for multiplexing UCI in asame PUCCH or PUSCH transmission or, when multiplexing is not possible,for dropping a number of PUSCH or PUCCH transmissions. The presentdisclosure additionally relates to defining prioritization rules and aUE behavior for time-overlapped PUSCH or PUCCH transmissions. Thepresent disclosure further relates to defining a UE capability for atime a UE requires to cancel a configured transmission. The presentdisclosure also relates to adjusting a number of repetitions for a PUCCHtransmission based on a number of UCI bits conveyed by the PUCCHtransmission. The present disclosure additionally relates to enablinguse of a different power or of a different number of repetitions for aPUCCH transmission depending on a UCI type included by the PUCCHtransmission. The present disclosure also relates to dynamicallyindicating a number of repetitions for a PUCCH transmission. Finally,the present disclosure relates to enabling a UE to avoid dropping UCI orto avoid transmitting UCI with a code rate that is larger than a coderate provided to the UE by higher layers.

A first embodiment of this disclosure considers a determination of aPUSCH for multiplexing HARQ-ACK from a UE when the UE transmits multiplePUSCH during a same slot.

In general, PUSCH transmissions can have different characteristics suchas a different number of available resources for multiplexing datainformation and UCI, due to being transmitted over differentcorresponding number of RBs or number of slot symbols, or havingdifferent data MCS or spectral efficiency, or experiencing interferenceor channel mediums with different propagation characteristics.

Also, a PUSCH transmission can be scheduled by a DCI format andtherefore have adaptive characteristics in associated parameters, suchas MCS/spectral efficiency and total number of available REs, or can beconfigured by higher layers and have non-adaptive characteristics. Dueto the dynamic nature of PUSCH transmissions on different cells orcarriers, selecting a PUSCH for UCI multiplexing while maintainingdesired target UCI reception reliability and minimizing an impact ondata information reception reliability in the PUSCH cannot, in general,be based only predetermined rules and needs to be dynamicallydetermined.

One predetermined rule can be that, when multiple PUSCH transmissionsare available for HARQ-ACK, or in general UCI, multiplexing from a UE,the UE selects for HARQ-ACK multiplexing a PUSCH transmission scheduledby a DCI format PUSCH transmission that is configured by higher layers.Another predetermined rule can be that the UE selects for HARQ-ACKmultiplexing a PUSCH transmission scheduled by a non-fallback DCI formatover a PUSCH transmission scheduled by a fallback DCI format, where thenon-fallback DCI format has larger size than the fallback DCI format, asthe latter can be associated with a PUSCH transmission on a cell wherethe UE is experiencing deterioration in communication reliability with agNB. For example, in 3GPP TS 38.212 v15.1.0, “NR, Multiplexing andChannel coding”, DCI format 0_0 is a fallback DCI format and DCI format0_1 is a non-fallback DCI format.

Further, a fallback DCI format does not include a beta_offset indicatorfield, as an existence of this field is configurable, when anon-fallback DCI format includes a beta_offset indicator field and thenan adjustment of HARQ-ACK coded modulation symbols in a PUSCHtransmission scheduled by a fallback DCI format is not as accurate as ina PUSCH transmission scheduled by a non-fallback DCI format. A fallbackDCI format also not include a DAI field, further resulting to HARQ-ACKmultiplexing in a corresponding PUSCH transmission being less reliablethan in a PUSCH transmission scheduled by a no fallback DCI format. Insuch case, if HARQ-ACK multiplexing is in a PUSCH transmission scheduledby a fallback UL DCI format that does not include a DAI field, the UEcan use the DAI field from the non-fallback DCI format to determine aHARQ-ACK codebook for multiplexing in the PUSCH transmission.

FIG. 10 illustrates a flow chart of a method 1000 for a determination ofa PUSCH for multiplexing HARQ-ACK information according to embodimentsof the present disclosure. The embodiment of the method 1000 illustratedin FIG. 10 is for illustration only and could have the same or similarconfiguration. FIG. 10 does not limit the scope of this disclosure toany particular implementation.

A UE is configured to transmit a first PUSCH and a second PUSCH and theUE has HARQ-ACK information to multiplex in a PUSCH 1010. The UEdetermines that the first PUSCH is scheduled by a fallback DCI format orby higher layer signaling and that the second PUSCH is scheduled by anon-fallback DCI format or by a DCI format, respectively, 1020. The UEmultiplexes the HARQ-ACK information in the second PUSCH 1030.

Among PUSCH transmissions scheduled by respective non-fallback DCIformats, a PUSCH for HARQ-ACK multiplexing can be either explicitlyindicated by respective DCI formats or implicitly determined based oncharacteristics of the PUSCH transmissions.

In a first approach, at least for non-fallback DCI formats, a DCI formatcan include a “HARQ-ACK_multiplexing” field of 1 bit indicating whetheror not the UE may multiplex HARQ-ACK in an associated PUSCHtransmission. For example, a binary “0” can indicate HARQ-ACKmultiplexing. Having an explicit indication of the PUSCH used forHARQ-ACK multiplexing also enables a gNB receiver to avoid multipledecoding operations when a UE fails to detect a DCI format scheduling aPUSCH transmission where the gNB expects the UE to multiplex theHARQ-ACK, and then the UE multiplexes the HARQ-ACK in a different PUSCHthat is not expected by the gNB, or avoid data buffer corruption whenthe gNB does not identify the PUSCH with HARQ-ACK multiplexing, forexample, because a respective decoding fails or because the gNB does notperform multiple decoding operations for UCI in respective multiplePUSCH transmissions. When the UE does not detect a DCI format indicatingHARQ-ACK multiplexing in a corresponding PUSCH transmission, the UE maytransmit HARQ-ACK in a PUCCH or the UE may not transmit HARQ-ACK.

As an alternative to introducing a “HARQ-ACK_multiplexing” field, atleast in a non-fallback DCI format scheduling a PUSCH transmission, oneor more states of an A-CSI request field can be used to also indicateHARQ-ACK multiplexing in a corresponding PUSCH. For example, for anA-CSI request field of 2 bits, a value of “01” can be used to indicateboth a corresponding configuration for an A-CSI report and HARQ-ACKmultiplexing in a corresponding PUSCH. For example, any value of anA-CSI request field other than ‘00’ can also indicate HARQ-ACKmultiplexing in a corresponding PUSCH. For example, HARQ-ACKmultiplexing can be in a PUSCH transmission indicated to not includedata information.

In a second approach, at least for non-fallback DCI formats, when a DAIfield is included in a DCI format scheduling a respective PUSCHtransmission, the DAI field can be used to implicitly indicate the PUSCHfor HARQ-ACK multiplexing. For example, a DAI field in a DCI formatscheduling a PUSCH transmission where a scheduling gNB expects a UE tomultiplex HARQ-ACK can have a first value while a DAI field in everyother DCI format scheduling a PUSCH transmission where a scheduling gNBdoes not expect a UE to multiplex HARQ-ACK can have a second value,different from the first value. At least when the UE detects only twoDCI formats scheduling respective PUSCH transmissions, the UE candetermine the PUSCH transmission for multiplexing HARQ-ACK from the twoDAI values in the two DCI formats and from the counter DAI or total DAIvalues in the DCI formats scheduling PDSCH receptions by the UE wherethe UE transmits the HARQ-ACK information in response to the PDSCHreceptions (including a SPS PDSCH release).

For example, when a DAI field in a DCI format scheduling a PUSCHtransmission from a UE is represented by 1 bit, the DAI field canequivalently act as a “HARQ-ACK_multiplexing” field by setting the valueto, for example, “1” to indicate to a UE a PUSCH transmission for UCImultiplexing and to “0” to indicate to the UE a PUSCH transmissionwithout UCI multiplexing. The UE can expect that the UE can detect DCIformats scheduling PUSCH transmissions in different cells during a sametime period where the DAI field in one of the DCI formats is set to “1”and the DAI fields in every other of the DCI formats is set to “0” andthe UE may not treat detection of such DCI formats as an error event.The UE may not expect to detect more than one DCI formats with an UL DAIfield equal to “1” unless the UE is configured to multiplex UCI inmultiple PUSCH transmissions.

For example, when a DAI field in a DCI format scheduling a PUSCHtransmission from a UE is represented by 2 bits, DAI values in first andsecond DCI formats scheduling respective first and second PUSCHtransmissions are “00” and “11” and the counter DAI in a last DCI formatscheduling a PDSCH transmission that the UE detects is “00,” the UEmultiplexes HARQ-ACK in the first PUSCH transmission. For example, whenDAI values in first and second DCI formats scheduling respective firstand second PUSCH transmissions are “00” and “11” and the counter DAI ina last DCI format scheduling a PDSCH transmission that the UE detects is“10,” the UE multiplexes HARQ-ACK in the second PUSCH transmission.

In general, a DAI value in a DCI format scheduling a PUSCH transmissionwhere a UE is expected to multiplex HARQ-ACK information is the one withthe smallest difference (modulo 4 for 2 DAI bits) relative to a counterDAI value in a last DCI format that the UE detects and schedules a PDSCHreception by the UE.

In order to increase a probability that a UE detects a DCI formatscheduling a PUSCH transmission where the UE can multiplex HARQ-ACKinformation, a gNB can set a corresponding value for aHARQ-ACK_multiplexing field according to the first approach or acorresponding value of a DAI field according to the second approach tobe same in more than one DCI formats.

A UE can select a PUSCH transmission, when more than one, formultiplexing HARQ-ACK information based on additional criteria such asmultiplexing HARQ-ACK information in a PUSCH transmitted on a cell orcarrier with the smallest index, or in a PUSCH transmission with thelargest data MCS, or in a PUSCH resulting to a smaller ratio for thenumber of HARQ-ACK coded modulation symbols over the number of datainformation coded modulation symbols or over the number of available REsfor transmission of data information and UCI.

A second embodiment of this disclosure considers a determination of anumber of HARQ-ACK coded modulation symbols in a PUSCH that includesonly UCI and does not include data information.

Using the formula of equation 4 can result to a significantover-dimensioning for a number of HARQ-ACK coded modulation symbols forat least two reasons. A first reason is that if only a number of CSIpart 1 information bits, O_(CSI,1), is considered as reference fordetermining a number of HARQ-ACK coded modulation symbols, this numberis typically small such as about 10, and does not represent a totalnumber of CSI bits as a number CSI part 2 information bits, O_(CSI,2),can be significantly larger than O_(CSI,1) or, equivalently,O_(CSI,1)+O_(CSI,2) can be an order or magnitude or more larger thanO_(CSI,1). However, using O_(CSI,1)+O_(CSI,2) instead of O_(CSI,1) inequation 4 is not practically possible as a gNB does not know theO_(CSI,2) value prior to decoding CSI part 1 and an incorrectdetermination can then lead to an incorrect determination for the numberof HARQ-ACK coded modulation symbols and a respective incorrect decodingfor the HARQ-ACK codeword at the gNB.

A second reason is that a configuration by higher layers of β_(offset)^(HARQ-ACK), β_(offset) ^(CSI-part1), and β_(offset) ^(CSI-part2) valuesis typically with respect to the case that UL-SCH data information isalso multiplexed in a respective PUSCH transmission. Then, for a targetdata information BLER that is about 10 times larger than a CSI BLER,using a same β_(offset) ^(HARQ-ACK) value in a PUSCH transmission withdata information and in a PUSCH transmission without data informationmay result to an over-dimensioning for the number of HARQ-ACK codedmodulation symbols by a factor of about 10.

In a first approach to enable a more accurate determination for a numberof HARQ-ACK coded modulation symbols in a PUSCH transmission withoutUL-SCH data information is to replace O_(CSI,1) in equation 4 with areference CSI payload O_(CSI,ref) resulting to

$Q_{ACK}^{\prime} = {\min{\{ {\lceil \frac{\begin{matrix}{( {O_{ACK} + L} ) \cdot M_{sc}^{PUSCH} \cdot N_{symb}^{PUSCH} \cdot} \\\beta_{offset}^{PUSCH}\end{matrix}}{O_{{CSI},{ref}}} \rceil,{\sum\limits_{l = 0}^{N_{{symb},{all}}^{PUSCH} - 1}\;{M_{sc}^{\Phi^{UCI}}(l)}}} \}.}}$The reference CSI payload O_(CSI,ref) can include the payload for CSIpart 1 and a respective predetermined payload for CSI part 2. Thereference CSI payload O_(CSI,ref) can also include CRC bits used as partof the encoding process for CSI part 1 or CSI part 2. Even when theactual CSI part 2 payload is different than the predetermined one, adetermination for the number of HARQ-ACK coded modulation symbols ismore accurate than when using O_(CSI,1) instead of O_(CSI,ref).

In a second approach to enable a more accurate determination for anumber of HARQ-ACK coded modulation symbols in a PUSCH transmissionwithout UL-SCH data information is for a DCI format scheduling the PUSCHtransmission from a UE to indicate a MCS/spectral efficiency for the CSItransmission. This can be achieved by including an information field of1 bit (“data presence” field) that indicates whether or not the UEinterprets the DCI format as scheduling transmissions of datainformation in addition to triggering a CSI report (indicated by anon-zero value of a ‘CSI request’ field) from the UE. When theinformation field does not indicate transmission of data information inthe PUSCH, the MCS field in the DCI format indicates an MCS for the CSItransmission, MCS_(CSI), where MCS_(CSI)=Q_(m)·R, Q_(m) is a modulationorder and R is a target code rate determined from the MCS field in theDCI format. Then, a number of HARQ-ACK coded modulation symbols can bedetermined as

$Q_{ACK}^{\prime} = {\min{\{ {\lceil {( {O_{ACK} + L} ) \cdot {\beta_{offset}^{PUSCH}/{MCS}_{CSI}}} \rceil,{\sum\limits_{l = 0}^{N_{{symb},{all}}^{PUSCH} - 1}\;{M_{sc}^{\Phi^{UCI}}(l)}}} \}.}}$

Alternatively, a O_(CSI) payload can be determined from the MCS_(CSI)and the number of PUSCH REs available for UCI multiplexing in the PUSCHtransmission (for example, excluding REs used for RS transmission).

In a third approach to enable a more accurate determination for a numberof HARQ-ACK coded modulation symbols in a PUSCH transmission withoutUL-SCH data information is to provide separate configuration for twosets of β_(offset) ^(HARQ-ACK) values, a first set for the case that theUE multiplexes data information in a PUSCH transmission and a second setfor the case that the UE does not multiplex data information in a PUSCHtransmission. This can also be extended in case of separate coding forCSI part 1 or CSI part 2 and HARQ-ACK/SR in a PUCCH. For example, theβ_(offset) ^(HARQ-ACK) values in the second set of values (that cancorrespond, for example to a respective set of HARQ-ACK payloads) canconsider a target CSI BLER instead of a target data BLER and, forexample, when the target CSI BLER is smaller than the target datainformation BLER, the target CSI BLER can have smaller values than thecorresponding ones in the first set of β_(offset) ^(HARQ-ACK) values.

Further, the β_(offset) ^(HARQ-ACK) values in the second set ofβ_(offset) ^(HARQ-ACK) values can consider the payload of CSI part 1 asfor the determination of the number of HARQ-ACK coded modulationsymbols, as in equation 4, or can consider a reference CSI payload thatcan include corresponding ones for both CSI part 1, CSI part 2, andpossibly CRC bits for the respective encoding processes.

In a fourth approach to enable a more accurate determination for anumber of HARQ-ACK coded modulation symbols in a PUSCH transmissionwithout UL-SCH data information is to apply a configuration of a coderate provided by higher layers and used by a UE to determine a number ofREs (coded modulation symbols) for HARQ-ACK or CSI part 1 multiplexingin a PUCCH transmission using PUCCH format 3 or PUCCH format 4.

Joint coding for HARQ-ACK and CSI part 1 information bits can then applyfor transmission in a PUSCH as for a transmission in the PUCCH (CSI part2 information bits are separately coded). Otherwise, separate coding ofHARQ-ACK information bits and CSI part 1 information bits can applywhere a number of HARQ-ACK coded modulation symbols is determined as theminimum one resulting to a corresponding code rate for HARQ-ACKinformation bits that is smaller than or equal to a code rate providedby higher layers. A number of CSI part 1 coded modulation symbols isdetermined as the minimum between (a) the minimum number of CSI part 1coded modulation symbols that result to a corresponding code rate forCSI part 1 bits that is smaller than or equal to a code rate provided byhigher layers and (b) the number of CSI part 1 coded modulation symbolsthat can be multiplexed in available PUSCH REs after excluding REs usedfor multiplexing HARQ-ACK and REs used for RS transmission.

A third embodiment of this disclosure considers an association between aPUCCH resource indication to a UE and a determination by the UE of a setof parameters that the UE uses to compute a PUCCH transmission power.

An association between a PUCCH resource and a set of parameters a UEuses to compute a PUCCH transmission power can be based on a mappingbetween a set of Q_(d) SS/PBCH block indexes or CSI-RS resourceconfigurations for path-loss measurements, as in equation 5, and a setof Q_(p) PUCCH spatial settings that correspond to SS/PBCH block indexesor CSI-RS resource configurations from the set Q_(d). The mapping can beprovided by higher layers.

When Q_(p)<Q_(d), the mapping can be based on a sub-set of the set withthe Q_(d) SS/PBCH block indexes or CSI-RS resource configurations. Forexample, the set Q_(d) can include 4 SS/PBCH block indexes and 8 CSI-RSresource configurations and the set Q_(p) can include 2 of the 4 SS/PBCHblock indexes and 2 of the 8 CSI-RS resource configurations.

Based on a PUCCH resource indicator field value in a DCI format,possibly complemented by implicit means as previously described, a UEcan derive a PUCCH resource and obtain a setting for a spatial filterfor the PUCCH transmission as a parameter of the PUCCH resource and thusobtain a SS/PBCH block index or with a CSI-RS resource configurationcorresponding to a path-loss measurement that the UE then applies todetermine a PUCCH transmission power, for example as in equation 5.

In order to mitigate an impact from potential error cases from animplicit PUCCH resource determination, when applicable in addition to anexplicit indication of a subset of PUCCH resources by a PUCCH resourceindication field, a PUCCH spatial setting can be same for all PUCCHresources in a subset of PUCCH resources indicated by the PUCCH resourceindication field. Then, Q_(p) can have a size equal to a number of PUCCHresource subsets that can be indicated by a PUCCH resource indicationfield in a DCI format.

A UE can also be provided by higher layers a mapping between a set ofSRS resources and a set of SS/PBCH indexes or CSI-RS resourceconfigurations for obtaining a path-loss estimate. When a DCI formatscheduling a PDSCH reception to the UE includes a SRS resource indicator(SRI) field having a value that indicates a SRS resource from the set ofSRS resources and the set of Q_(p) PUCCH spatial settings also includesthe SRS resource, the UE can use a path-loss corresponding to a SS/PBCHblock or a CSI-RS resource configuration that is mapped to the SRSresource to determine a transmission power for a PUCCH conveyingHARQ-ACK in response to the PDSCH reception.

FIG. 11 illustrates a flow chart of a method 1100 for a determination bythe UE of a PUCCH transmission power based on a spatial settingparameter for a PUCCH resource according to embodiments of the presentdisclosure. The embodiment of the method 1100 illustrated in FIG. 11 isfor illustration only and could have the same or similar configuration.FIG. 11 does not limit the scope of this disclosure to any particularimplementation.

A UE detects a DCI format that schedules a PDSCH reception and includesa PUCCH resource indication field 1110. The DCI format can also includean SRI field. The UE determines a PUCCH resource based on the PUCCHresource indicator field 1120. The PUCCH resource determination can alsobe complemented by implicit means. The UE determines a PUCCH spatialsetting parameter for the PUCCH resource that corresponds to an index ofa SS/PBCH block or to a CSI-RS resource configuration 1130. The UEdetermines a path-loss measurement that the UE computed using theSS/PBCH block or the CSI-RS 1140.

The UE transmits a PUCCH with a power that the UE determines using thepath-loss measurement 1150. When the DCI format indicates a SRS resourcethat is mapped by higher layer signaling to a SS/PBCH block index or aCSI-RS configuration the UE uses to measure a path-loss, the UE can usethe corresponding path-loss to determine a PUCCH transmission power.

As a same PUCCH format can be used for transmission of different UCItypes, such as HARQ-ACK or CSI, and as different UCI types can havedifferent reception reliability targets, a set of parameters that a UEuses to determine a PUCCH transmission power for a same PUCCH format canbe separately configured to the UE by higher layers depending on the UCItype. For example, a value for P_(O_PUCCH,f,c)(q_(u)) can be separatelyconfigured for HARQ-ACK transmission and for CSI transmission for a samePUCCH format.

When a UE multiplexes both HARQ-ACK and CSI in a same PUCCH, the UE canuse the larger of the configured P_(O_PUCCH,f,c)(q_(u)) values in orderto achieve the higher of the corresponding reception reliabilities forthe UCI types. The other values for the set of PUCCH parameters can besame or can be separately configured.

A fourth embodiment of this disclosure considers the UE behavior in caseof time-overlapped PUCCH transmissions or overlapped PUCCH and PUSCHtransmission on a UL, BWP of a serving cell and the determination ofconditions for defining a UE behavior.

Partially overlapping PUCCH transmissions can generally occur forvarious combinations of UCI types. In practice, and for slot-based PUCCHtransmissions, a gNB scheduler may not configure a UE with partiallyoverlapping periodic PUCCH transmissions, especially if the UE may dropone of them due to the partial overlapping. The only non-periodic PUCCHtransmission can be for HARQ-ACK. A slot and a first symbol for a PUCCHtransmission is indicated by the DCI format triggering the HARQ-ACKtransmission and, for PUCCH transmissions spanning at least 4 symbols ina slot, the UE typically knows the slot of the HARQ-ACK transmission atleast from the previous slot.

If a UE has a configured PUCCH transmission for CSI in a same slot as aPUCCH transmission for HARQ-ACK and a first symbol for the former PUCCHtransmission is same or after a first symbol for the latter PUCCHtransmission, the UE can multiplex CSI in the latter PUCCH transmission.If the first symbol for the former PUCCH transmission is before thefirst symbol for the latter PUCCH transmission, CSI can again bemultiplexed in the latter PUCCH transmission if there is sufficient timefor the UE to cancel (the not yet ongoing) transmission of the formerPUCCH.

In a first approach, a specific UE capability can be defined for anumber of slot symbols required by a UE to cancel a PUCCH transmissionthat is configured by higher layers, such as a periodic orsemi-persistent HARQ-ACK, SR, or CSI transmission in a PUCCH, orindicated by a DCI format such as a HARQ-ACK transmission indicated by aDCI format in a PUCCH. In a second approach, a UE capability for PUSCHpreparation of N₂ symbols, can be considered as a loose bound for a timerequired to a UE to cancel a transmission.

If a time between a reception by a UE of a PDSCH scheduled by a DCIformat triggering a HARQ-ACK transmission in a latter PUCCH and a firstsymbol of an earlier PUCCH is larger than N₂ symbols, the UE can cancelthe earlier PUCCH transmission and multiplex CSI in the latter PUCCHtransmission. Otherwise, the UE may not be assumed to be able to cancelthe earlier PUCCH transmission and the UE may drop the latter PUCCHtransmission. Also, the UE may treat this as an error case because thegNB may not be expected to trigger a PUCCH transmission for HARQ-ACK ina slot where the UE may drop the corresponding PUCCH transmission.

FIG. 12 illustrates an example UE behavior 1200 for multiplexing UCIfrom time-overlapped PUCCH transmissions in one of the PUCCHtransmissions according to embodiments of the present disclosure. Theembodiment of the UE behavior 1200 illustrated in FIG. 12 is forillustration only and could have the same or similar configuration. FIG.12 does not limit the scope of this disclosure to any particularimplementation.

When a UE is configured a CSI transmission in a first PUCCH 1205 thatstarts later than a HARQ-ACK transmission in a second PUCCH 1210 (can beassumed to be indicated by a DCI format) in a same slot 1220, the UEmultiplexes the CSI and HARQ-ACK in the second PUCCH transmission 1230and drops the transmission of the first PUCCH. When a UE is configured aCSI transmission in a third PUCCH 1240 that starts earlier than aHARQ-ACK transmission in a fourth PUCCH 1245 (can be assumed to beindicated by a DCI format) in a same slot 1220, two cases areconsidered.

In a first case (Case A), a time between the time the UEreceives/detects the DCI format indicating the fourth PUCCH transmissionand the time the UE is configured to start the third PUCCH transmissionis larger than or equal to a time required for a UE to cancel the thirdPUCCH transmission, such as for example larger than or equal to N₂ slotsymbols. For this case (Case A), the UE drops the third PUCCHtransmission and multiplexes CSI with HARQ-ACK in the fourth PUCCHtransmission 1250. In a second case (Case B), a time between the timethe UE receives/detects the DCI format indicating the fourth PUCCHtransmission and the time the UE is configured to start the third PUCCHtransmission is smaller than a time required for a UE to cancel thethird PUCCH transmission, such as for example smaller than N₂ slotsymbols. For this case (Case B), the UE drops the fourth PUCCHtransmission and transmits only CSI in the third PUCCH transmission1260. It is also possible for the UE to consider this case to be anerror case, for example with respect to one or more DCI formatdetections indicating the fourth PUCCH transmission.

HARQ-ACK and SR multiplexing in a PUCCH can depend on when a positive SRrequest is provided from higher layers to the physical layer at the UE.However, HARQ-ACK and SR multiplexing can still be supported withoutconsideration of the first slot symbol for corresponding PUCCHtransmissions. The UE can transmit a negative SR if a positive SRrequest from higher layers is not provided to the physical layer earlyenough for the UE to be able to multiplex the positive SR (set thecorresponding value of one or more SR bits) with the HARQ-ACK in thePUCCH transmission when the PUCCH transmission for HARQ-ACK startsbefore the PUCCH transmission for SR. The UE can transmit the positiveSR at the next SR transmission occasion in a PUCCH.

Therefore, for slot-based PUCCH transmissions (i.e. excluding PUCCHtransmission for SR with periodicity smaller than one slot), a UE cansupport or not support HARQ-ACK and CSI or SR multiplexing in a PUCCHwithout consideration for the first slot symbol of the correspondingPUCCHs subject to potential error cases as previously described.

For non-slot (sub-slot) based PUCCH transmissions, such as ones for SRwith transmission periodicity less than one slot, one possibility is fora UE to drop an ongoing PUCCH (or possibly PUSCH) transmission in orderto transmit a PUCCH conveying SR. However, a minimum time, such as atime equal to a PUSCH preparation time or a time indicated by a UEcapability for cancelling an ongoing transmission, is required forcancelling an ongoing transmission. This minimum time is larger than afew slot symbols (e.g. the minimum value for N₂ is 10 symbols for 15 KHzsubcarrier spacing).

Nevertheless, a UE not transmitting SR when the UE has an ongoing PUCCHor PUSCH transmission is not a problem as the additional latencyincurred for a positive SR transmission is not expected to have amaterial impact on the overall scheduling latency. For example, anaverage additional latency incurred for a UE from an inability totransmit a positive SR with sub-slot periodicity is at most half a slotand needs to be further conditioned on the UE having an ongoing PUCCHtransmission (or a PUSCH transmission) in the slot. Even with arelatively large probability of 50% for the UE to be transmitting PUCCHwith HARQ-ACK or PUSCH in a slot, the resulting additional latency is atmost 0.25 slots or less which has marginal impact on the end-to-endlatency (even for a 0.5 msec slot).

For a PUCCH transmission conveying HARQ-ACK with repetitions overmultiple slots and a higher priority for HARQ-ACK than for data, a UEcan disregard UL grants resulting to PUSCH transmissions in slots wherethe UE repeats a PUCCH transmission (the likely cause if a false CRCcheck as the gNB scheduler would otherwise have no reason to schedulePUSCH since the UE drops the PUSCH transmission). Also, the UE may notmultiplex other UCI in the repetitions of the PUCCH transmissionconveying HARQ-ACK as this may degrade the reception reliability (andN_(PUCCH) ^(repeat) is semi-statically configured). Also, the UE candisregard DL assignments indicating a respective HARQ-ACK transmissionin a slot where the UE is transmitting a repetition (other than thefirst one) for a PUCCH conveying HARQ-ACK.

There are two issues associated with 5G features that may not allowdirect re-use of the LTE functionality: potential for partialoverlapping with PUSCH or other PUCCH transmissions with the PUSCH orthe other PUCCH being earlier; and existence of an overlapping(grant-free) PUSCH transmission that requires low latency or existenceof a positive SR transmission associated with a low latency service.

For the first issue, the UE can cancel the overlapping PUSCHtransmission or the other PUCCH transmission. The case that the PUSCH orthe other PUCCH starts prior to the first repetition of the PUCCHtransmission with the HARQ-ACK and the UE cannot cancel the respectivetransmission can be considered to be an error (as there is no need toexpect the gNB to indicate a slot where the UE cannot transmit the firstPUCCH repetition).

The second issue is of no particular practical interest as a (coveragelimited) UE requiring PUCCH repetitions are likely to require even morerepetitions for PUSCH or for information types requiring higherreception reliability. Moreover, as previously discussed, a UE cannotimmediately cancel an ongoing transmission. Therefore, UE and gNBoperation need not be affected by dropped PUCCH repetitions and the gNBneed not perform blind detection for whether or not a PUSCH or PUCCH isreceived in a slot as this can also be difficult to reliably determinefor coverage limited UEs.

For multiplexing UCI in a PUSCH transmission, instead of a PUCCHtransmission, support of dynamic PUSCH and PUCCH (with HARQ-ACK)transmission timings can result to several possible combinations foroverlapping of PUSCH and PUCCH transmissions. Overlapping can generallyrequire different handling depending on when the PUSCH or the PUCCHtransmission was triggered. For simplicity, the following assume that aPUCCH is transmitted without repetitions.

If a UE does not detect a DCI format triggering a PUCCH transmissionafter a DCI format scheduling a PUSCH transmission in a same slot, theUE knows of a possible overlapping when the UE prepares the PUSCH (UEhas the minimum PUSCH preparation time available to cancel the PUCCHtransmission). The UE can therefore multiplex the HARQ-ACK in the PUSCHand drop the PUCCH regardless of the PUCCH/PUSCH overlapping type(same/different first symbol). In case the UE has multiple PUSCHtransmissions in multiple UL BWPs or in multiple serving cells, the samerule can apply and the UE can multiplex the HARQ-ACK in a PUSCH.

If a UE detects a DCI format triggering a PUCCH transmission after a DCIformat scheduling a PUSCH transmission in the same slot, there can beHARQ-ACK information that the UE cannot multiplex in the PUSCH (e.g. dueto PDSCH being received after the PUSCH is triggered). Also, the UEPUSCH processing timeline would be reduced if the UE had to multiplexHARQ-ACK in the PUSCH. The UE can then transmit the earlier channel.

Therefore, if a UE does not detect a DCI format triggering a PUCCHtransmission after a DCI format scheduling a PUSCH transmission in thesame slot, the UE multiplexes HARQ-ACK in the PUSCH (and PUCCH isdropped). If a UE detects a DCI format triggering a PUCCH transmissionafter a DCI format scheduling a PUSCH transmission in the same slot, theUE drops the later transmission.

For overlapping between periodic PUCCH and dynamic PUSCH transmissionswith different first symbols and with the periodic PUCCH transmissionnot occurring earlier than the PUSCH transmission, the UE drops thePUCCH.

For overlapping between periodic (RRC configured) PUCCH and dynamic(scheduled by a DCI format) PUSCH transmissions with different firstsymbols and with the periodic PUCCH transmission occurring earlier thanthe PUSCH transmission, the UE drops the PUCCH transmission andmultiplexes the corresponding UCI in the PUSCH if a time between thetime the UE receives/detects the DCI format scheduling the PUSCHtransmission and the starting time of the PUCCH transmission (firstsymbol of the PUCCH transmission) is equal to or larger than the PUCCHcancellation time (can be indicated by the UE to the gNB or assumed tobe same as a PUSCH preparation time). The UE can then cancel the PUCCHtransmission. Also, a UE can consider as an error case the case that atime between a PDSCH reception associated with transmission of HARQ-ACKinformation in a PUCCH and a start of a PUSCH transmission the overlapswith the PUCCH transmission is smaller than the PUCCH cancellation timeas the gNB may not be expected to schedule a PUSCH transmission that theUE may drop. The same rule applies when a UE has multiple simultaneousPUSCH transmissions.

FIG. 13 illustrates an example UE behavior 1300 for multiplexing UCIfrom time-overlapped PUCCH and PUSCH transmissions in a PUSCHtransmission according to embodiments of the present disclosure. Theembodiment of the UE behavior 1300 illustrated in FIG. 13 is forillustration only and could have the same or similar configuration. FIG.13 does not limit the scope of this disclosure to any particularimplementation.

A periodic PUCCH transmission is considered but same principles applyfor a PUCCH transmission triggered by a DCI format as is subsequentlydiscussed. When a UE is configured a PUCCH transmission 1305 that startsearlier than an overlapping PUSCH transmission scheduled to the UE by aDCI format 1310 in a same slot 1320, the UE multiplexes the UCI of theperiodic PUCCH transmission, such as CSI, in the PUSCH 1330 when a timebetween the time the UE receives/detects the DCI format scheduling thePUSCH transmission and the starting time of the PUCCH transmission(first symbol of the PUCCH transmission) 1340 is equal to or larger thanthe PUCCH cancellation time 1350.

Otherwise, when a time between the time the UE receives/detects the DCIformat scheduling the PUSCH transmission and the starting time of thePUCCH transmission 1360 is smaller than the PUCCH cancellation time1370, the UE drops the PUSCH transmission and transmits the UCI in thePUCCH 1380.

For a PUCCH transmission from a UE that conveys HARQ-ACK information andis triggered by a DL DCI format scheduling a corresponding PDSCHreception to the UE, the UE multiplexes HARQ-ACK in a PUSCH transmissionthat overlaps in time with the PUCCH transmission when a time betweenthe time the UE receives the PDSCH and the time of the start of thePUSCH transmission is larger than or equal to the PUSCH preparationtime. To provide additional time margin to the UE, another option isthat the UE multiplexes HARQ-ACK in a PUSCH transmission that overlapsin time with the PUCCH transmission when a time between the time the UEcompletes a corresponding reception of transport blocks in a PDSCHscheduled by the DCI format and the time of the start of the PUSCHtransmission is larger than or equal to the PUSCH preparation time.

A fifth embodiment of this disclosure considers a power adjustment forPUCCH transmission for small UCI payloads and a determination for anumber of repetitions for a PUCCH transmission based on a number of UCIbits included in the PUCCH.

A gNB can provide, by higher layer signaling, to a UE a reference numberof repetitions for a PUCCH transmission. The reference number ofrepetitions can correspond to a reference UCI payload (number of UCIinformation bits, including CRC bits if any). The reference UCI payloadcan be predetermined in a system operation, such as 1 UCI bit, or 2 UCIbits, or 4 UCI bits, or can be also provided by higher layer signaling.A number of repetitions can be separately provided to a UE for each UCItype, such as HARQ-ACK, SR, of CSI and the UE determines a number ofrepetitions for a PUCCH transmission based on the type of the UCI bitsthat are included in the PUCCH transmission.

A UE configured with repetitions for a PUCCH transmission can maintain asame PUCCH transmission power instead of, when possible, adjusting thePUCCH transmission power based on the UCI payload in the PUCCH asdescribed in equation 5. A configuration for repetitions for a PUCCHtransmission can also include a single transmission (no repetitions) forthe reference UCI payload (and for UCI payloads smaller than thereference UCI payload). When the UE is provided by higher layers aconfiguration for a PUCCH transmission with repetitions, the UE canapply one or more repetitions for UCI payloads larger than the referenceUCI payload even when the UE is indicated by higher layers norepetitions for a PUCCH transmission with the reference UCI payload.

For PUCCH format 1, the power control formula in equation 5 can beadjusted to include an additional term of 10 log₁₀ O_(UCI) dB to adjustfor the UCI (HARQ-ACK/SR) payload depending on whether O_(UCI)=1 bit orO_(UCI)=2 bits. For example, in PUCCH transmission occasion

${\Delta_{{TF},b,f,c}(i)} = {10\;{\log_{10}( \frac{N_{ref}^{PUCCH}}{N_{symb}^{PUCCH}} )}}$can be modified as

${\Delta_{{TF},b,f,c}(i)} = {{10\;{\log_{10}( \frac{N_{ref}^{PUCCH}}{N_{symb}^{PUCCH}} )}} + {10\;\log_{10}{O_{UCI}.}}}$

For a configured number of PUCCH repetitions N_(PUCCH) ^(repeat)corresponding to a UCI reference payload of 1 bit, a UE may not be ableto increase the PUCCH transmission power by Δ_(TF,b,f,c)(i)=10log₁₀(K₁·O_(UCI)/N_(RE)) when 2<O_(UCI)≤11, for example because the UEtransmission power is already close to the maximum transmission.Instead, the UE increases a number of repetitions for the PUCCHtransmission. For a PUCCH transmission that includes O_(UCI)=2 UCI bits,the UE can apply 2·N_(PUCCH) ^(repeat) repetitions. For a PUCCHtransmission that includes 2<O_(UCI)≤11 UCI bits, the UE can apply, forexample, ┌N_(PUCCH) ^(repeat)·K₁·O_(UCI)/N_(RE)┐ repetitions or└N_(PUCCH) ^(repeat)·K₁·O_(UCI)/N_(RE)┘ repetitions. The UCI payload cancorrespond to a single UCI type, such as n_(HARQ-ACK) HARQ-ACKinformation bits, or to multiple UCI types such as to O_(SR)+O_(CSI)information bits.

UCI payloads that can be supported by a PUCCH transmission withrepetitions can be limited, for example to at most O_(UCI)=11 bits, asUEs that transmit PUCCH in transmission occasion i with a power close toa maximum power P_(CMAX,f,c)(i) are typically coverage limited and donot need to provide a large number of HARQ-ACK information bits ordetailed CSI reports. For repetitions of a PUCCH transmission thatincludes O_(UCI)>11 bits, a number of repetitions can be determined, forexample as ┌(2^(K, BPRE)−1)·N_(PUCCH) ^(repeat)┐, where K₂=2.4 andBPRE=(O_(ACK)+O_(SR)+O_(CSI)+O_(CRC))/N_(RE).

FIG. 14 illustrates a flow chart of a method 1400 for determination fora number of repetitions of a PUCCH transmission that includes a UCIpayload, based on a number of repetitions provided by higher layers fora reference UCI payload according to embodiments of the presentdisclosure. The embodiment of the method 1400 illustrated in FIG. 14 isfor illustration only and could have the same or similar configuration.FIG. 14 does not limit the scope of this disclosure to any particularimplementation.

A UE is provided by higher layers a number of repetitions N_(PUCCH)^(repeat) for a PUCCH transmission 1410. The UE can also be provided byhigher layers a reference UCI payload for the N_(PUCCH) ^(repeat)repetitions or the reference UCI payload can be predetermined such as 1bit. The UE has O_(UCI)≤11 UCI bits to transmit in a PUCCH intransmission occasion i where the UCI bits correspond to eithern_(HARQ-ACK) HARQ-ACK information bits, or to O_(CSI) CSI bits, or toO_(SR)+O_(CSI) SR and CSI bits, and so on 1420.

The UE transmits the PUCCH with N_(PUCCH) ^(repeat) repetitions whenn_(HARQ-ACK)=1 (or when O_(SR)=1 if the UE transmits SR for a single SRconfiguration), or with 2·N_(PUCCH) ^(repeat) repetitions whenn_(HARQ-ACK)=2 (or when O_(SR)=2 if the UE transmits SR for one of fourpossible configurations), or with ┌N_(PUCCH)^(repeat)·K₁·O_(UCI)/N_(RE)┐ repetitions when n_(HARQ-ACK)>2, or whenthe UCI is CSI, or when the UE transmits SR for one of more than fourpossible configurations 1430.

A number of repetitions N_(PUCCH) ^(repeat) for a PUCCH transmission canalso be relative to a reference payload of O_(UCI) ^(ref)>1 UCI bitsinstead of 1 UCI bit (N_(PUCCH) ^(repeat) can be denoted as N_(PUCCH)^(repeat)(O_(UCI) ^(ref))). The reference payload of O_(UCI) ^(ref) UCIbits can be predetermined in a system operation, such as O_(UCI)^(ref)=1 bit or O_(UCI) ^(ref)=11 bits, or be provided to the UE byhigher layer signalling. Then, a number of repetitions for a PUCCHtransmission with payload of O_(UCI) UCI bits can be smaller or largerthan N_(PUCCH) ^(repeat) when O_(UCI) is respectively smaller or largerthan O_(UCI) ^(ref).

For example, if O_(UCI) ^(ref)>2 and O_(UCI)=1 or O_(UCI)=2, a number ofrepetitions for a PUCCH transmission can be determined by adjusting fora difference in respective Δ_(TF,b,f,c)(i) components as

${N_{PUCCH}^{repeat}( O_{UCI} )} = {\lceil {\frac{O_{UCI} \cdot {N_{ref}^{PUCCH}/N_{symb}^{PUCCH}}}{K_{1} \cdot {O_{UCI}^{ref}/N_{RE}}} \cdot {N_{PUCCH}^{repeat}( O_{UCI}^{ref} )}} \rceil.}$For example, if O_(UCI) ^(ref)>2 and O_(UCI)>2, a number of repetitionsfor a PUCCH transmission can be determined by adjusting for a differencein respective Δ_(TF,b,f,c)(i) components as

${N_{PUCCH}^{repeat}( O_{UCI} )} = {\lceil {\frac{O_{UCI}}{O_{UCI}^{ref}} \cdot {N_{PUCCH}^{repeat}( O_{UCI}^{ref} )}} \rceil.}$For simplicity,

${N_{PUCCH}^{repeat}( O_{UCI} )} = \lceil {\frac{O_{UCI}}{O_{UCI}^{ref}} \cdot {N_{PUCCH}^{repeat}( O_{UCI}^{ref} )}} \rceil$can apply to all UCI payloads up to 11 bits.

Instead of adjusting the number of repetitions according to a UCIpayload of O_(UCI) UCI bits (including O_(CRC) CRC bits whenO_(UCI)>11), a UE can adjust a PUCCH transmission power. This approachassumes that a number of repetitions for a PUCCH transmission, N_(PUCCH)^(repeat), that is configured to the UE is with respect to a referenceUCI payload O_(UCI) ^(ref). For example, when O_(UCI)≤O_(UCI) ^(ref), aUE can transmit the PUCCH using N_(PUCCH) ^(repeat) repetitions whilereducing the power by 10 log₁₀(O_(UCI) ^(ref)/O_(UCI)) dB. ForO_(UCI)>O_(UCI) ^(ref), the UE can determine a number of repetitionslarger than N_(PUCCH) ^(repeat), for example as described in FIG. 14.

A value of O_(UCI) ^(ref) can be provided to the UE by a gNB usinghigher layer signalling or be predetermined in a system operation. Forexample, a value of O_(UCI) ^(ref) can be same as a maximum UCI payloadthat a UE can transmit an associated PUCCH with repetitions. Fortransmission of one or two HARQ-ACK information bits, a UE can reduce atransmission power by Δ_(TF_adjust,b,f,c)(i)=10log₁₀(K₁·(n_(HARQ-ACK)+O_(SR)+O_(CSI))/N_(RE))−10 log₁₀(N_(ref)^(PUCCH)/N_(symb) ^(PUCCH)) when 2<O_(UCI) ^(ref)≤11 bits or byΔ_(TF_adjust,b,f,c)(i)=10 log₁₀((2^(K) ² ^(·BPRE)−1))−10 log₁₀(N_(ref)^(PUCCH)/N_(symb) ^(PUCCH)) when O_(UCI) ^(ref)>11 bits. Fortransmission of 2<O_(UCI)≤11 bits when O_(UCI) ^(ref)>11, the UE canadjust a PUCCH transmission power (while using N_(PUCCH) ^(repeat)repetitions) by Δ_(TF_adjust,b,f,c)(i)=10 log₁₀((2^(K) ² ^(·BPRE)−1))−10log₁₀(K₁·(n_(HARQ-ACK)+O_(SR)+O_(CSI))/N_(RE)).

In addition to adjusting a number of repetitions for a PUCCHtransmission or a power of a PUCCH transmission with repetitionsdepending on a UCI payload, a number of repetitions for a PUCCHtransmission or a power of a PUCCH transmission can also be adjustedbased on a number of symbols of a slot available for each repetition ofa PUCCH transmission. For a PUCCH that includes HARQ-ACK information, aninitial (first) symbol in a slot and a duration for each repetition of aPUCCH transmission is indicated by a DCI format associated with theHARQ-ACK information.

As the duration of each repetition for a PUCCH transmission can dependon a corresponding PUCCH resource that can vary depending on acorresponding indication by the DCI format, a number of requiredrepetitions or a power for each repetition of the PUCCH transmission canalso vary. When a UE is configured with N_(PUCCH) ^(repeat) repetitionsof a PUCCH transmission, the UE can also be provided a reference numberof symbols N_(PUCCH,ref) ^(repeat,symb) in a slot corresponding to theN_(PUCCH) ^(repeat) repetitions. When a duration for a repetition of aPUCCH transmission in a slot is smaller than N_(PUCCH,ref)^(repeat,symb), the UE can increase a PUCCH transmission power whilewhen a duration for a repetition of a PUCCH transmission in a slot islarger than N_(PUCCH,ref) ^(repeat,symb), the UE can decrease a PUCCHtransmission power.

Alternatively, when a duration for a repetition of a PUCCH transmissionin a slot is smaller than N_(PUCCH,ref) ^(repeat,symb), the UE canincrease a number of repetitions while when a duration for a repetitionof a PUCCH transmission in a slot is larger than N_(PUCCH,ref)^(repeat,symb), the UE can decrease a number of repetitions for a PUCCHtransmission.

A power adjustment (positive or negative or zero) is

${\Delta_{{TF},b,f,c}(i)} = {10\;{\log_{10}( \frac{N_{symb}^{PUCCH}}{N_{{PUCCH},{ref}}^{{repeat},{symb}}} )}\mspace{14mu}{{dB}.}}$For example, when N_(PUCCH,ref) ^(repeat,symb)=4 (a minimum number ofsymbols in a slot for a repetition of a PUCCH transmission) and arepetition of a PUCCH transmission is over N_(symb) ^(PUCCH), the UE candecrease a transmission power by

${\Delta_{{TF},b,f,c}(i)} = {10\;{\log_{10}( \frac{N_{symb}^{PUCCH}}{N_{{PUCCH},{ref}}^{{repeat},{symb}}} )}\mspace{14mu}{{dB}.}}$For example, when N_(PUCCH,ref) ^(repeat,symb)=14 (a maximum number ofsymbols in a slot for a repetition of a PUCCH transmission) and arepetition of a PUCCH transmission is over N_(symb) ^(PUCCH), the UE canincrease a transmission power by

${\Delta_{{TF},b,f,c}(i)} = {10\;{\log_{10}( \frac{N_{symb}^{PUCCH}}{N_{{PUCCH},{ref}}^{{repeat},{symb}}} )}\mspace{14mu}{{dB}.}}$

An adjustment for a number of repetitions, when there is no poweradjustment, can be by a factor of ┌N_(PUCCH,ref) ^(repeat,symb)/N_(symb)^(PUCCH)┐ for a resulting number of ┌N_(PUCCH,ref)^(repeat,symb)/N_(symb) ^(PUCCH)┐·N_(PUCCH) ^(repeat) repetitions whenN_(PUCCH,ref) ^(repeat,symb)>N_(symb) ^(PUCCH), or by a factor of┌N_(symb) ^(PUCCH)/N_(PUCCH,ref) ^(repeat,symb)┐ for a resulting numberof ┌N_(symb) ^(PUCCH)/N_(PUCCH,ref) ^(repeat,symb)┌·N_(PUCCH) ^(repeat)repetitions when N_(PUCCH,ref) ^(repeat,symb)>N_(symb) ^(PUCCH) (the“floor” function instead of the “ceiling” function can be used as analternative).

A sixth embodiment of this disclosure considers a dynamic determinationfor a number of repetitions for a PUCCH transmission.

A dynamic determination for a number of repetitions for a PUCCHtransmission is beneficial when channel medium conditions ortransmission/reception conditions of a PUCCH transmission dynamicallychange and the UE needs to increase a PUCCH transmission power,potentially above a maximum allowed transmission power, when theconditions degrade, or decrease a PUCCH transmission power when theconditions improve. For example, such conditions can include dynamicchanges in shadowing, or dynamic changes in transmission/reception beamsproviding sufficiently large SINR, or addition/removal of receptionpoints, and so on. In such cases, it is beneficial to enable a networkto dynamically vary a number of repetitions for a PUCCH transmissioneven for a same UCI payload.

A dynamic indication for a number of repetitions for a PUCCHtransmission is provided by a DCI format associated with the PUCCHtransmission, for example when the PUCCH includes HARQ-ACK information.The indication for a number of repetitions for a PUCCH transmission canbe explicit, by including a corresponding field in the DCI format, orimplicit based on the value of another field in the DCI format.

In a first approach, an implicit indication can be provided byassociating a transmission configuration indicator (TCI) state indicatedby the DCI format, and related to quasi-collocation information for a UEto determine a spatial filter to apply for the PUCCH transmission, witha number of PUCCH repetitions. For example, a first TCI state can beassociated by higher layers with a first number of repetitions for aPUCCH transmission and a second TCI state can be associated by higherlayers with a second number of repetitions for a PUCCH transmission. TheDCI format can indicate a TCI state for a PUCCH transmission and the UEcan determine a number of repetitions for the PUCCH transmission basedon the association/mapping provided by higher layers between TCI statesand numbers of repetitions for the PUCCH transmission. The DCI formatcan indicate a TCI state regardless of whether or not an associatedPUCCH transmission is configured with repetitions.

The mapping of TCI states to numbers of repetitions for a PUCCHtransmission can be separately configured for each PUCCH format or canbe common for all PUCCH formats. A determination for a number ofrepetitions for a PUCCH transmission can also be combined with the fifthembodiment of this disclosure where the association between a TCI stateand a number of repetitions for a PUCCH transmission can be for areference UCI payload (that can also be provided by higher layers or canbe predetermined in the system operation) and the UE can adjust a numberof repetitions of a PUCCH transmission based on a UCI payload includedin the PUCCH transmission.

When the DCI format does not include a field indicating a TCI state,from a configured set of TCI states, the TCI state with index zero fromthe configured set of TCI states or the TCI state in a last DCI formatthat includes a field indicating a TCI state that the UE detects can beused to determine a number of PUCCH repetitions. The first approach canalso apply when a UE is not configured with repetitions for a PUCCHtransmission and in such case a TCI state can be associated a value,from a configured set of values, for P_(O_PUCCH,b,f,c)(q_(u)) orΔ_(F_PUCCH)(F).

In a second approach, an implicit indication can be provided byassociating a PUCCH resource indicated by the DCI format with a numberof PUCCH repetitions. For example, a first PUCCH resource can beassociated by higher layers with a first number of repetitions for aPUCCH transmission, such as single transmission in a slot, and a secondPUCCH resource can be associated by higher layers with a second numberof repetitions for a PUCCH transmission, such as two transmissions insame symbols over two corresponding slots.

The DCI format can indicate a resource for a PUCCH transmission and theUE can determine a number of repetitions for the PUCCH transmissionbased on an association provided by higher layers between PUCCHresources and numbers of repetitions for the PUCCH transmission or byincluding a number of repetitions are part of a configuration forparameters associated with a PUCCH resource. This can be combined withthe fifth embodiment of this disclosure where the association between aPUCCH resource and a number of repetitions for a PUCCH transmission canbe for a reference UCI payload (that can also be provided by higherlayers or can be predetermined in the system operation) and the UE canadjust a number of repetitions of a PUCCH transmission based on a UCIpayload included in the PUCCH transmission. The second approach can alsoapply when a UE is not configured with repetitions for a PUCCHtransmission and in such case a PUCCH resource can be associated avalue, from a configured set of values, for P_(O_PUCCH,b,f,c)(q_(u)) orΔ_(F_PUCCH)(F).

In a third approach, an implicit indication can be provided byassociating a TPC command value indicated by the DCI format with anumber of PUCCH repetitions. For example, a predetermined TPC commandvalue can be associated with a number of repetitions for a PUCCHtransmission that is provided by higher layers. This can be combinedwith the fifth embodiment of this disclosure where the associationbetween a TPC command value and a number of repetitions for a PUCCHtransmission can be for a reference UCI payload (that can also beprovided by higher layers or can be predetermined in the systemoperation) and the UE can adjust a number of repetitions of a PUCCHtransmission based on a UCI payload included in the PUCCH transmission.

FIG. 15 illustrates a flow chart of a method 1500 for determination fora number of repetitions of a PUCCH transmission based on an indicatedTCI state in a DCI format triggering the PUCCH transmission according toembodiments of the present disclosure. The embodiment of the method 1500illustrated in FIG. 15 is for illustration only and could have the sameor similar configuration. FIG. 15 does not limit the scope of thisdisclosure to any particular implementation.

A UE is provided by higher layers a set of TCI states and a set ofnumbers of repetitions for a PUCCH transmission 1510. Each element ofthe set of numbers of repetitions for a PUCCH transmission is mapped toan element of the set of TCI states, for example through a one-to-onemapping or a many-to-one mapping. The UE detects a DCI format thattriggers a PUCCH transmission and includes a field indicating a TCIstate for the PUCCH transmission 1520. The UE determines a number ofrepetitions for the PUCCH transmission, for a corresponding UCI payload,based on the mapping of the indicated TCI state to an element from theset of numbers of repetitions for a PUCCH transmission 1530. The UEtransmits the PUCCH using the determined number of repetitions 1540.

In a fourth approach, a number of repetitions for a PUCCH transmissionthat includes HARQ-ACK information can be determined based on a DCIformat associated with the HARQ-ACK information. For example, a UE cantransmit a PUCCH with a first number of repetitions when a correspondingHARQ-ACK information is associated with a first DCI format and cantransmit a PUCCH with a second number of repetitions when acorresponding HARQ-ACK information is associated with a second DCIformat. The first and second DCI formats can be differentiated byrespective first and second RNTIs used to scramble respective CRC bits,by respective first and second DCI format sizes, or a by a field in eachDCI format indicating whether the DCI format is a first DCI format or asecond DCI format.

A seventh embodiment of this disclosure considers a determination of aPUCCH transmission power or of a number of repetitions for a PUCCHtransmission depending on a UCI type.

Higher layers can provide separate configuration per UCI type for a samePUCCH format for values of open-loop power control parameters, such asP_(O_PUCCH,b,f,c)(q_(u)) or Δ_(F_PUCCH)(F). Alternatively, the formulain equation 5 for determining a PUCCH transmission power can include anadditional term, Δ_(UCI-type), that is provided by higher layers for aUCI type (HARQ-ACK information, SR, or CSI) and can be common for allapplicable PUCCH formats, such as PUCCH format 3 or PUCCH format 4, orcan be separately provided for each PUCCH format. Further,Δ_(F_PUCCH)(F) can be replaced Δ_(UCI-type) and equation 5 can bereplaced by equation 6.

It is also possible that Δ_(UCI-type) is not provided for one UCI type,such as for example for HARQ-ACK, and default value such as 0 is used inthat case. The Δ_(UCI-type) values can be positive or negative.

$\begin{matrix}{{P_{{PUCCH},b,f,c}( {i,q_{u},q_{d},l} )} = {\min{\begin{Bmatrix}{{P_{{CMAX},f,c}(i)},} \\\begin{matrix}{{P_{{O\_{PUCCH}},b,f,c}( q_{u} )} + {10\;{\log_{10}( {2^{\mu} \cdot {M_{{RB},b,f,c}^{PUCCH}(i)}} )}} + {{PL}_{b,f,c}( q_{d} )} +} \\{\Delta_{{UCI}\text{-}{type}} + {\Delta_{{TF},b,f,c}(i)} + {g_{b,f,c}( {i,l} )}}\end{matrix}\end{Bmatrix}\mspace{14mu}\lbrack {{db}M} \rbrack}}} & {{equation}\mspace{14mu} 6}\end{matrix}$

With a separate configuration of one or more open loop parameters perUCI type, a PUCCH transmission power can be independent among UCI types.For example, for a same payload, a PUCCH transmission power can bedifferent when the PUCCH includes HARQ-ACK information than when thePUCCH includes CSI. The closed loop power control parameters can becommon for the different UCI types as a typical purpose of closed-looppower control in to track variations in a channel medium. Similar,higher layers can provide separate configuration per UCI type for anumber of PUCCH repetitions. For example, when a UE transmits a PUCCHusing PUCCH format 3 and for a given UCI payload, the UE can beconfigured by higher layers to transmit CSI using 2 repetitions and totransmit HARQ-ACK using 4 repetitions.

When different UCI types are multiplexed in a same PUCCH, a UE can beconfigured by higher layers the values of the open-loop power controlparameters, or the number of PUCCH repetitions, to use for the PUCCHtransmission. It is also possible that the UE determines those values bya predetermined rule without higher layer signaling. For example, the UEcan use the values configured for transmission of HARQ-ACK informationin a PUCCH when the UE multiplexes HARQ-ACK information and SR or CSI ina same PUCCH. For example, the UE can use the largerP_(O_PUCCH,b,f,c)(q_(u)) value, or the larger Δ_(F_PUCCH)(F) value, orthe larger Δ_(UCI-type) value when the UE multiplexes differentcorresponding UCI types in a PUCCH transmission.

FIG. 16 illustrates a flow chart of a method 1600 for determination fora PUCCH transmission power based on a UCI type that is included in thePUCCH transmission according to embodiments of the present disclosure.The embodiment of the method 1400 illustrated in FIG. 16 is forillustration only and could have the same or similar configuration. FIG.16 does not limit the scope of this disclosure to any particularimplementation.

A UE is provided by higher layers a power offset value Δ_(HARQ-ACK) fora PUCCH transmission that includes HARQ-ACK information, or a poweroffset value Δ_(SR) for a PUCCH transmission that includes SR, or apower offset value Δ_(CSI) for a PUCCH transmission that includes CSI1610. The UE determines whether or not a single UCI type is included inthe PUCCH 1620. When a single UCI type is included in the PUCCH, the UEdetermines a PUCCH transmission power using the Δ_(HARQ-ACK) poweroffset value when the PUCCH includes only HARQ-ACK information, or usingthe Δ_(SR) power offset value when the PUCCH includes only SR, or usingthe Δ_(CSI) power offset value when the PUCCH includes only CSI 1630.When multiple UCI types are included in the PUCCH, the UE uses thelarger of the corresponding Δ_(UCI-type) values 1640.

A eighth embodiment of this disclosure considers a determination for anumber of slots for a PUCCH transmission in order for a UE to avoiddropping UCI or to transmit UCI with a code rate that is smaller than orequal to a code rate provided to the UE by higher layers.

A UE can be configured by higher layers to extend a PUCCH transmission,with an indicated first and last symbol in a slot, over multiple slotssubject to a resulting code rate being smaller than or equal to a coderate r provided to a UE by higher layers. Unlike repetitions of a PUCCHtransmission where the encoding of UCI bits considers rate matching overavailable REs over one slot and repeats across slots, for a PUCCHtransmission extended over multiple slots, the encoding of UCI bitsconsiders rate matching over available REs of the multiple slots. The UEcan also be provided by higher layers a maximum number of slots N_(slot)^(PUCCH) for extending a PUCCH transmission. A number of RBs for thePUCCH transmission is same in all slots of the PUCCH transmission.

The UE determines a minimum number of slots, N_(slot,min) ^(PUCCH), thatis smaller than or equal to a number of slots N_(slot) ^(PUCCH) providedby higher layers, and result to a code rate for the UCI (including CRC,when any) transmission in a PUCCH that is smaller than or equal to acode rate r provided to a UE by higher layers. Denoting by M_(RB)^(PUCCH) a number of RBs for a PUCCH transmission (can be a maximumnumber of RBs available for PUCCH transmission), by N_(sc,ctrl) ^(RB) anumber of subcarriers per RB (REs) that are available for UCItransmission in the PUCCH, by N_(symb-UCI) ^(PUCCH) a number of symbolsin a slot for UCI transmission in the PUCCH, and by Q_(m) a number ofmodulation symbols per RE (modulation order), it is O_(UCI)≤M_(RB)^(PUCCH)·N_(sc,ctrl) ^(RB)·N_(symb-UCI) ^(PUCCH)·N_(slot,min)^(PUCCH)·Q_(m)·r and O_(UCI)>M_(RB) ^(PUCCH)·N_(sc,ctrl)^(RB)·N_(symb-UCI) ^(PUCCH)·(N_(slot,min) ^(PUCCH)−1)·Q_(m)·r, whereO_(UCI) is a number of UCI bits including CRC bits, when any. The UEtransmits the PUCCH over the minimum number of slots N_(slot,min)^(PUCCH).

When a code rate for UCI transmission over N_(slot) ^(PUCCH) slots islarger than r, that is when O_(UCI)>M_(RB) ^(PUCCH)·N_(sc,ctrl)^(RB)·N_(symb-UCI) ^(PUCCH)·N_(slot) ^(PUCCH)·Q_(m)·r, the UE firstdrops UCI, such as CSI reports or part 2 of CSI reports when applicable,and transmits the UCI in a PUCCH over the N_(slot) ^(PUCCH) slots evenwhen a resulting code rate is larger than r. The UE can also beconfigured by higher layers to apply HARQ-ACK bundling in a spatial,time, or cell domain when the UE has dropped all CSI reports, or hasdropped all CSI part 2 reports, and a resulting code rate remains largerthan r, that is when O_(UCI)>M_(RB) ^(PUCCH)·N_(sc,ctrl)^(RB)·N_(symb-UCI) ^(PUCCH)·N_(slot) ^(PUCCH)·Q_(m)·r.

FIG. 17 illustrates a flow chart of a method 1700 for determination fora number of slots for a PUCCH transmission based on a code rate and anumber of slots provided by higher layers according to embodiments ofthe present disclosure. The embodiment of the method 1700 illustrated inFIG. 17 is for illustration only and could have the same or similarconfiguration. FIG. 17 does not limit the scope of this disclosure toany particular implementation.

A UE is provided by higher layers a code rate r and a (maximum) numberN_(slot) ^(PUCCH) of slots for UCI transmission in a PUCCH 1710. The UEdetermines a minimum number of slots N_(slot,min) ^(PUCCH)≤N_(slot)^(PUCCH) for the PUCCH transmission that either results to a UCI coderate smaller than or equal to r or N_(slot,min) ^(PUCCH)=N_(slot)^(PUCCH) 1720. The UE encodes the UCI over a number of subcarriers andsymbols available for UCI transmission in N_(slot,min) ^(PUCCH) slotsand transmits the PUCCH over the N_(slot,min) ^(PUCCH) slots 1730.

Instead of determining a number of slots, up to a maximum number ofslots provided by higher layers, for a PUCCH transmission based on aresulting UCI code rate being smaller than or equal to a code rateprovided by higher layers, the eighth embodiment can also apply in asimilar manner for determining a number of symbols in a slot. A UE canbe provided only a first symbol and a maximum number of symbols for aPUCCH transmission in a slot and the UE can adaptively determine anumber of symbols for the PUCCH transmission in the slot based on aresulting UCI code rate being smaller than or equal to a code rateprovided by higher layers.

To enable different reception reliability targets for different UCItypes, a code rate r provided to a UE by higher layers can also beindependently provided per UCI type. For example, a UE can be separatelyprovided by higher layers a first code rate r for HARQ-ACK transmissionand a second code rate r for CSI transmission.

The code rate r provided to a UE by higher layers can also beindependently provided per service type. For example a UE can beseparately provided by higher layers a first code rate r₁ for HARQ-ACKtransmission corresponding to a first service type such as mobilebroadband and a second code rate r₂ for HARQ-ACK transmissioncorresponding to a second service type such as ultra-reliable lowlatency communications. The UE can determine the code rate to applybased, for example, on an indication by a DCI format scheduling a PDSCHreception that is associated with the HARQ-ACK transmission, such as avalue of a field in the DCI format, a RNTI used to scramble a CRC of theDCI format, a size of the DCI format, and so on. When different UCItypes are jointly multiplexed (coded) in a same PUCCH, the smaller ofthe corresponding code rates can be used to determine a number ofresources, such as a number of RBs, a number of symbols of a slot, or anumber of slots, or to determine UCI dropping requirements when thesmaller of the code rates is not fulfilled when all UCI is transmitted.

Although the present disclosure has been described with an exemplaryembodiment, various changes and modifications may be suggested to oneskilled in the art. It is intended that the present disclosure encompasssuch changes and modifications as fall within the scope of the appendedclaims.

None of the description in this application should be read as implyingthat any particular element, step, or function is an essential elementthat must be included in the claims scope. The scope of patented subjectmatter is defined only by the claims. Moreover, none of the claims areintended to invoke 35 U.S.C. § 112(f) unless the exact words “means for”are followed by a participle.

What is claimed is:
 1. A method comprising: receiving a physicaldownlink control channel (PDCCH) that provides a first downlink controlinformation (DCI) format; decoding the first DCI format, wherein thefirst DCI format: schedules a physical uplink shared channel (PUSCH)transmission, and includes a first field indicating whether or notuplink shared channel (UL-SCH) information is multiplexed in the PUSCH;determining to multiplex or not multiplex UL-SCH information in thePUSCH depending on the indication in the first field; and transmittingthe PUSCH based on the determination.
 2. The method of claim 1, whereinthe first field includes 1 bit.
 3. The method of claim 1, wherein: thefirst DCI format includes a second field indicating whether or notchannel state information (CSI) is multiplexed in the PUSCH, and whenthe first field indicates that UL-SCH information is not multiplexed inthe PUSCH, the second field indicates that the CSI is multiplexed in thePUSCH.
 4. The method of claim 1, further comprising: receiving a numberof physical downlink shared channels (PDSCHs) that provide a number oftransport blocks (TB s); and determining a number of coded modulationsymbols for multiplexing acknowledgement information for the TBs in thePUSCH depending on: a number of data information bits multiplexed in thePUSCH when the first field indicates that UL-SCH information ismultiplexed in the PUSCH, and a value of a modulation and coding scheme(MCS) field in the first DCI format when the first field indicates thatUL-SCH information is not multiplexed in the PUSCH.
 5. The method ofclaim 3, wherein: the PUSCH transmission is a first PUSCH transmissionon a first cell and overlaps in time with a second PUSCH transmission ona second cell, the second PUSCH transmission on the second cell isconfigured by higher layer signaling, and the CSI is multiplexed in thefirst PUSCH transmission on the first cell.
 6. The method of claim 3,wherein: the PUSCH transmission is a first PUSCH transmission on a firstcell having a first index and overlaps in time with a second PUSCHtransmission on a second cell having a second index, the second PUSCHtransmission on the second cell is scheduled by a second DCI format, andthe CSI is multiplexed in one of the first and second PUSCHtransmissions that is on one of the first and second cells that has thesmaller of the two indexes.
 7. The method of claim 1, furthercomprising: decoding a second DCI format, wherein the second DCI format:schedules a reception of data information in a physical downlink sharedchannel (PDSCH), and indicates a transmission time for a physical uplinkcontrol channel (PUCCH) with acknowledgement information in response tothe reception of data information; and multiplexing the acknowledgementinformation in the PUSCH when a time between a last symbol of the PDSCHreception and a first symbol of the PUSCH transmission is smaller thanor equal to a predetermined time.
 8. A user equipment (UE) comprising: areceiver configured to receive a physical downlink control channel(PDCCH) that provides a first downlink control information (DCI) format;a decoder configured to decode the first DCI format, wherein the firstDCI format: schedules a physical uplink shared channel (PUSCH)transmission, and includes a first field indicating whether or notuplink shared channel (UL-SCH) information is multiplexed in the PUSCH;a multiplexer configured to multiplex or not multiplex UL-SCHinformation in the PUSCH depending on the indication in the first field;and a transmitter configured to transmit the PUSCH.
 9. The UE of claim8, wherein the first field includes 1 bit.
 10. The UE of claim 8,wherein: the first DCI format includes a second field indicating whetheror not channel state information (CSI) is multiplexed in the PUSCH, andwhen the first field indicates that UL-SCH information is notmultiplexed in the PUSCH, the second field indicates that the CSI ismultiplexed in the PUSCH.
 11. The UE of claim 8, wherein: the receiveris further configured to receive a number of physical downlink sharedchannels (PDSCHs) that provide a number of transport blocks (TBs); andthe multiplexer is further configured to multiplex a number of codedmodulation symbols for acknowledgement information for the TBs in thePUSCH that is determined depending on: a number of data information bitsmultiplexed in the PUSCH when the first field indicates that UL-SCHinformation is multiplexed in the PUSCH, and a value of a modulation andcoding scheme (MCS) field in the first DCI format when the first fieldindicates that UL-SCH information is not multiplexed in the PUSCH. 12.The UE of claim 10, wherein: the PUSCH transmission is a first PUSCHtransmission on a first cell and overlaps in time with a second PUSCHtransmission on a second cell, the second PUSCH transmission on thesecond cell is configured by higher layer signaling, and the multiplexeris further configured to multiplex the CSI in the first PUSCHtransmission on the first cell.
 13. The UE of claim 10, wherein: thePUSCH transmission is a first PUSCH transmission on a first cell havinga first index and overlaps in time with a second PUSCH transmission on asecond cell having a second index, the second PUSCH transmission on thesecond cell is scheduled by a second DCI format, and the multiplexer isfurther configured to multiplex the CSI in one of the first and secondPUSCH transmissions that is on one of the first and second cells thathas the smaller of the two indexes.
 14. The UE of claim 8, wherein: thedecoder is further configured to decode a second DCI format, wherein thesecond DCI format: schedules a reception of data information in aphysical downlink shared channel (PDSCH), and indicates a transmissiontime for a physical uplink control channel (PUCCH) with acknowledgementinformation in response to the reception of data information; and themultiplexer is further configured to multiplex the acknowledgementinformation in the PUSCH when a time between a last symbol of the PDSCHreception and a first symbol of the PUSCH transmission is smaller thanor equal to a predetermined time.
 15. A base station comprising: anencoder configured to encode a first downlink control information (DCI)format, wherein the first DCI format: schedules a physical uplink sharedchannel (PUSCH) transmission, and includes a first field indicatingwhether or not uplink shared channel (UL-SCH) information is multiplexedin the PUSCH; a transmitter configured to transmit a physical downlinkcontrol channel (PDCCH) with the first DCI format; a receiver configuredto receive the PUSCH; and a de-multiplexer configured to de-multiplex ornot de-multiplex UL-SCH information in the PUSCH depending on theindication in the first field.
 16. The base station of claim 15, whereinthe first field includes 1 bit.
 17. The base station of claim 15,wherein: the first DCI format includes a second field indicating whetheror not channel state information (CSI) is multiplexed in the PUSCH, andwhen the first field indicates that UL-SCH information is notmultiplexed in the PUSCH, the second field indicates that the CSI ismultiplexed in the PUSCH.
 18. The base station of claim 15, wherein: thetransmitter is further configured to transmit a number of physicaldownlink shared channels (PDSCHs) that provide a number of transportblocks (TBs); and the de-multiplexer is further configured tode-multiplex a number of coded modulation symbols for acknowledgementinformation for the TBs in the PUSCH that is determined depending on: anumber of data information bits multiplexed in the PUSCH when the firstfield indicates that UL-SCH information is multiplexed in the PUSCH, anda value of a modulation and coding scheme (MCS) field in the first DCIformat when the first field indicates that UL-SCH information is notmultiplexed in the PUSCH.
 19. The base station of claim 17, wherein: thePUSCH reception is a first PUSCH reception on a first cell and overlapsin time with a second PUSCH reception on a second cell, the second PUSCHreception on the second cell is configured by higher layer signaling,and the de-multiplexer is further configured to de-multiplex the CSI inthe first PUSCH reception on the first cell.
 20. The base station ofclaim 17, wherein: the PUSCH reception is a first PUSCH reception on afirst cell having a first index and overlaps in time with a second PUSCHreception on a second cell having a second index, the second PUSCHreception on the second cell is scheduled by a second DCI format, andthe de-multiplexer is further configured to de-multiplex the CSI in oneof the first and second PUSCH receptions that is on one of the first andsecond cells that has the smaller of the two indexes.